🟢 Easy Level Questions (1–40)
1️⃣ Which of the following mirrors always forms a virtual and erect image? 🪞
- A. Concave Mirror
- B. Convex Mirror
- C. Plane Mirror
- D. Parabolic Mirror
Show Answer 🔽
✅ C. Plane Mirror
2️⃣ The focal length of a plane mirror is: 📏
- A. Zero
- B. Infinite
- C. Negative
- D. One
Show Answer 🔽
✅ B. Infinite
3️⃣ Which mirror is used in rear-view mirrors of vehicles? 🚗
- A. Concave Mirror
- B. Plane Mirror
- C. Convex Mirror
- D. Spherical Mirror
Show Answer 🔽
✅ C. Convex Mirror
4️⃣ The center of a spherical mirror is called: 🎯
- A. Focus
- B. Pole
- C. Aperture
- D. Centre of Curvature
Show Answer 🔽
✅ D. Centre of Curvature
5️⃣ A concave mirror forms a virtual, erect, and magnified image when the object is placed: 🔍
- A. At infinity
- B. At the centre of curvature
- C. Between focus and pole
- D. Beyond 2F
Show Answer 🔽
✅ C. Between focus and pole
6️⃣ The power of a convex lens is: 💡
- A. Zero
- B. Negative
- C. Positive
- D. Infinite
Show Answer 🔽
✅ C. Positive
7️⃣ What is the unit of power of a lens? 📐
- A. Newton
- B. Dioptre
- C. Watt
- D. Volt
Show Answer 🔽
✅ B. Dioptre
8️⃣ The mirror used by dentists is usually: 🦷
- A. Plane Mirror
- B. Convex Mirror
- C. Concave Mirror
- D. Cylindrical Mirror
Show Answer 🔽
✅ C. Concave Mirror
9️⃣ The image formed by a convex mirror is always: 🪞
- A. Real, inverted
- B. Virtual, erect, diminished
- C. Real, magnified
- D. Virtual, magnified
Show Answer 🔽
✅ B. Virtual, erect, diminished
🔟 The SI unit of focal length is: 📏
- A. Centimeter
- B. Millimeter
- C. Meter
- D. Dioptre
Show Answer 🔽
✅ C. Meter
1️⃣1️⃣ Which of these is a real image? 🧠
- A. Formed by plane mirror
- B. Can be seen on screen
- C. Always upright
- D. Formed by convex mirror
Show Answer 🔽
✅ B. Can be seen on screen
1️⃣2️⃣ A concave mirror gives an image of same size when the object is at: 🔍
- A. Focus
- B. Centre of curvature
- C. Between focus and pole
- D. Infinity
Show Answer 🔽
✅ B. Centre of curvature
1️⃣3️⃣ Radius of curvature is always: 📏
- A. Double of focal length
- B. Half of focal length
- C. Same as focal length
- D. One-fourth of focal length
Show Answer 🔽
✅ A. Double of focal length
1️⃣4️⃣ A real image is always: 🧾
- A. Inverted
- B. Upright
- C. Virtual
- D. Enlarged
Show Answer 🔽
✅ A. Inverted
1️⃣5️⃣ The light ray that passes through the center of curvature reflects:
- A. At 90°
- B. Back along the same path
- C. At an angle of incidence
- D. Towards the focus
Show Answer 🔽
✅ B. Back along the same path
1️⃣6️⃣ The focus of a convex mirror lies: 🎯
- A. In front of mirror
- B. Behind the mirror
- C. On the mirror
- D. Cannot be determined
Show Answer 🔽
✅ B. Behind the mirror
1️⃣7️⃣ In concave mirrors, the image formed at infinity is: 🌌
- A. Real and enlarged
- B. Real and point-sized
- C. Virtual and diminished
- D. Erect and magnified
Show Answer 🔽
✅ B. Real and point-sized
1️⃣8️⃣ Power of a lens is positive if it is a: ➕
- A. Concave lens
- B. Plane lens
- C. Convex lens
- D. Biconcave lens
Show Answer 🔽
✅ C. Convex lens
1️⃣9️⃣ What is the unit of refractive index? 📐
- A. m
- B. cm
- C. No unit
- D. Dioptre
Show Answer 🔽
✅ C. No unit
2️⃣0️⃣ A ray of light passing through optical center of lens: 🔦
- A. Gets reflected
- B. Bends towards the axis
- C. Passes undeviated
- D. Forms virtual image
Show Answer 🔽
✅ C. Passes undeviated
2️⃣1️⃣ Which of the following is true for a virtual image?
- A. Can be formed on screen
- B. Is always inverted
- C. Can never be magnified
- D. Cannot be formed on screen
Show Answer 🔽
✅ D. Cannot be formed on screen
2️⃣2️⃣ Which mirror always forms virtual, erect and diminished images? 🪞
- A. Concave mirror
- B. Convex mirror
- C. Plane mirror
- D. Parabolic mirror
Show Answer 🔽
✅ B. Convex mirror
2️⃣3️⃣ When an object is placed at 2F in a convex lens, where is the image formed? 🔍
- A. Between F and 2F
- B. At infinity
- C. At 2F
- D. At F
Show Answer 🔽
✅ C. At 2F
2️⃣4️⃣ A plane mirror forms an image that is: 🪞
- A. Real, inverted and same size
- B. Virtual, erect and magnified
- C. Virtual, erect and same size
- D. Real, erect and diminished
Show Answer 🔽
✅ C. Virtual, erect and same size
2️⃣5️⃣ The image formed by a convex lens when the object is between F and the optical center is: 📷
- A. Real and inverted
- B. Virtual and erect
- C. Real and erect
- D. At infinity
Show Answer 🔽
✅ B. Virtual and erect
2️⃣6️⃣ What is the focal length of a plane mirror? 🔄
- A. Zero
- B. Infinite
- C. 15 cm
- D. Undefined
Show Answer 🔽
✅ B. Infinite
2️⃣7️⃣ Light travels fastest in: ⚡
- A. Water
- B. Air
- C. Vacuum
- D. Glass
Show Answer 🔽
✅ C. Vacuum
2️⃣8️⃣ Which surface is best for regular reflection? 🪞
- A. Rough wall
- B. Polished metal
- C. Paper
- D. Black cloth
Show Answer 🔽
✅ B. Polished metal
2️⃣9️⃣ The SI unit of power of a lens is: 🧪
- A. Watt
- B. Dioptre
- C. Joule
- D. Lux
Show Answer 🔽
✅ B. Dioptre
3️⃣0️⃣ A convex lens of focal length 25 cm has a power of: 🔎
- A. +4 D
- B. -4 D
- C. +2.5 D
- D. +1.5 D
Show Answer 🔽
✅ C. +4 D
3️⃣1️⃣ A concave mirror forms a real and inverted image when object is: 🎯
- A. Between focus and pole
- B. At the pole
- C. Beyond the center of curvature
- D. Behind the mirror
Show Answer 🔽
✅ C. Beyond the center of curvature
3️⃣2️⃣ Which phenomenon causes a coin in a water-filled glass to appear raised? 💧
- A. Reflection
- B. Refraction
- C. Scattering
- D. Absorption
Show Answer 🔽
✅ B. Refraction
3️⃣3️⃣ When light bends towards the normal, it means: 🧠
- A. Light is moving from rarer to denser medium
- B. Light is moving from denser to rarer medium
- C. Light is reflected
- D. Total internal reflection
Show Answer 🔽
✅ A. Light is moving from rarer to denser medium
3️⃣4️⃣ A concave mirror of focal length 10 cm, object at 20 cm. Image formed is: 🔬
- A. Virtual and magnified
- B. Real, inverted and same size
- C. Diminished and inverted
- D. On focus
Show Answer 🔽
✅ B. Real, inverted and same size
3️⃣5️⃣ In sign convention, distances measured opposite to incident light are: ➖
- A. Zero
- B. Positive
- C. Negative
- D. Imaginary
Show Answer 🔽
✅ C. Negative
3️⃣6️⃣ The image formed by a convex mirror is: 🪞
- A. Real and inverted
- B. Virtual and erect
- C. Diminished and real
- D. Enlarged and inverted
Show Answer 🔽
✅ B. Virtual and erect
3️⃣7️⃣ Which device uses concave mirrors? 🔦
- A. Rear view mirror
- B. Headlights of vehicles
- C. Shaving mirror
- D. Both B and C
Show Answer 🔽
✅ D. Both B and C
3️⃣8️⃣ What type of lens is used to correct hypermetropia? 👓
- A. Convex lens
- B. Concave lens
- C. Cylindrical lens
- D. Bifocal lens
Show Answer 🔽
✅ A. Convex lens
3️⃣9️⃣ Which part of the mirror reflects the most light? 💡
- A. Painted part
- B. Outer surface
- C. Silver-coated back surface
- D. Center of curvature
Show Answer 🔽
✅ C. Silver-coated back surface
4️⃣0️⃣ The lens used as magnifying glass is: 🔍
- A. Concave
- B. Convex
- C. Cylindrical
- D. Plane
Show Answer 🔽
✅ B. Convex
4️⃣1️⃣ Which of the following is the mirror formula? 🧮
- A. 1/f = v + u
- B. f = uv
- C. 1/f = 1/v + 1/u
- D. v = u + f
Show Answer 🔽
✅ C. 1/f = 1/v + 1/u
4️⃣2️⃣ A convex mirror always forms: 🪞
- A. Real and inverted image
- B. Virtual and erect image
- C. Real and erect image
- D. Virtual and inverted image
Show Answer 🔽
✅ B. Virtual and erect image
4️⃣3️⃣ If the focal length of a lens is +20 cm, it is a: 🔍
- A. Concave mirror
- B. Concave lens
- C. Convex lens
- D. Plane mirror
Show Answer 🔽
✅ C. Convex lens
4️⃣4️⃣ When an object is placed at focus of a concave mirror, image formed is: 📷
- A. Real and inverted
- B. At infinity
- C. Virtual and erect
- D. On the mirror
Show Answer 🔽
✅ B. At infinity
4️⃣5️⃣ What is the power of a lens of focal length 25 cm? 💡
- A. +2.5 D
- B. -4 D
- C. +4 D
- D. -2.5 D
Show Answer 🔽
✅ C. +4 D
4️⃣6️⃣ A real and inverted image formed by convex lens is: 🔍
- A. Always virtual
- B. Can be captured on screen
- C. Cannot be captured on screen
- D. Always upright
Show Answer 🔽
✅ B. Can be captured on screen
4️⃣7️⃣ In mirror formula, the object distance is always: 📐
- A. Positive
- B. Negative
- C. Zero
- D. Variable
Show Answer 🔽
✅ B. Negative
4️⃣8️⃣ A concave mirror of focal length 15 cm, object is placed at 30 cm, image is: 🔬
- A. Virtual and magnified
- B. Real and same size
- C. Real and enlarged
- D. Virtual and diminished
Show Answer 🔽
✅ B. Real and same size
4️⃣9️⃣ Which of the following is not true for concave lens? 🔎
- A. Forms real images
- B. Has negative power
- C. Diverges light
- D. Forms virtual images
Show Answer 🔽
✅ A. Forms real images
5️⃣0️⃣ The image formed when object is between F and pole of concave mirror is: 🧲
- A. Real and inverted
- B. Virtual and erect
- C. Diminished
- D. On the focus
Show Answer 🔽
✅ B. Virtual and erect
5️⃣1️⃣ A lens that is thinner at the center and thicker at edges is: 🔍
- A. Convex lens
- B. Concave lens
- C. Plane mirror
- D. None
Show Answer 🔽
✅ B. Concave lens
5️⃣2️⃣ A ray parallel to principal axis after refraction from convex lens passes through: 🔭
- A. Focus
- B. Pole
- C. Optical center
- D. Centre of curvature
Show Answer 🔽
✅ A. Focus
5️⃣3️⃣ What is the nature of image formed by a concave mirror when the object is at infinity? 🌌
- A. Virtual and erect
- B. Real and point-sized
- C. Virtual and magnified
- D. Erect and same size
Show Answer 🔽
✅ B. Real and point-sized
5️⃣4️⃣ If a ray passes through the principal focus of a concave mirror and strikes the mirror, it will: 💫
- A. Pass through the pole
- B. Reflect back through focus
- C. Become parallel to principal axis
- D. Go through centre of curvature
Show Answer 🔽
✅ C. Become parallel to principal axis
5️⃣5️⃣ The unit of power of a lens is: 📐
- A. Watt
- B. Dioptre
- C. Newton
- D. Joule
Show Answer 🔽
✅ B. Dioptre
5️⃣6️⃣ The image formed by a convex lens when object is at 2F is: 🔎
- A. Same size, real and inverted
- B. Virtual and erect
- C. Diminished and virtual
- D. Magnified and real
Show Answer 🔽
✅ A. Same size, real and inverted
5️⃣7️⃣ A concave mirror forms a virtual image when the object is placed: 🪞
- A. At infinity
- B. Between F and pole
- C. At 2F
- D. Beyond C
Show Answer 🔽
✅ B. Between F and pole
5️⃣8️⃣ Which quantity remains constant in all mediums for a given color of light? 🌈
- A. Wavelength
- B. Frequency
- C. Speed
- D. Amplitude
Show Answer 🔽
✅ B. Frequency
5️⃣9️⃣ A concave lens always forms an image which is: 🔍
- A. Virtual, erect and diminished
- B. Real and erect
- C. Virtual and magnified
- D. Real and inverted
Show Answer 🔽
✅ A. Virtual, erect and diminished
6️⃣0️⃣ A ray of light passes undeviated through: ➖
- A. Optical center of lens
- B. Principal focus
- C. Center of curvature
- D. Any point
Show Answer 🔽
✅ A. Optical center of lens
6️⃣1️⃣ The refractive index of glass is approximately: 🧊
- A. 1.0
- B. 1.33
- C. 1.5
- D. 2.0
Show Answer 🔽
✅ C. 1.5
6️⃣2️⃣ In which medium does light travel fastest? ⚡
- A. Glass
- B. Air
- C. Water
- D. Vacuum
Show Answer 🔽
✅ D. Vacuum
6️⃣3️⃣ What happens when light enters from air to glass obliquely? 🔦
- A. It bends away from normal
- B. It travels undeviated
- C. It bends towards normal
- D. It is reflected fully
Show Answer 🔽
✅ C. It bends towards normal
6️⃣4️⃣ A lens with negative focal length is: ➖
- A. Concave lens
- B. Convex lens
- C. Convex mirror
- D. Plane mirror
Show Answer 🔽
✅ A. Concave lens
6️⃣5️⃣ What is the nature of the image formed by convex mirror irrespective of object position? 🪞
- A. Virtual, erect and diminished
- B. Real, inverted and magnified
- C. Virtual and magnified
- D. Real and diminished
Show Answer 🔽
✅ A. Virtual, erect and diminished
6️⃣6️⃣ A concave mirror is used in: 🦷
- A. Rear-view mirror
- B. Torch
- C. Spectacles
- D. Window glass
Show Answer 🔽
✅ B. Torch
6️⃣7️⃣ What is the value of magnification if image is same size as object? 📏
- A. +2
- B. –2
- C. +1
- D. 0
Show Answer 🔽
✅ C. +1
6️⃣8️⃣ Power of a lens is reciprocal of: 🔁
- A. Refractive index
- B. Magnification
- C. Focal length (in meters)
- D. Radius of curvature
Show Answer 🔽
✅ C. Focal length (in meters)
6️⃣9️⃣ A diverging lens always has: ➖
- A. Positive power
- B. Real focus
- C. Virtual focus
- D. Both A and B
Show Answer 🔽
✅ C. Virtual focus
7️⃣0️⃣ Which mirror is used in solar cookers to focus sunlight? ☀️
- A. Convex mirror
- B. Concave mirror
- C. Plane mirror
- D. Parabolic lens
Show Answer 🔽
✅ B. Concave mirror
7️⃣1️⃣ When object is at infinity, image by convex lens is formed at: 🌐
- A. Focus
- B. 2F
- C. At pole
- D. Behind the lens
Show Answer 🔽
✅ A. Focus
7️⃣2️⃣ The sign convention is based on: 📐
- A. Cartesian plane
- B. Circular path
- C. Random values
- D. Experimental data
Show Answer 🔽
✅ A. Cartesian plane
7️⃣3️⃣ In convex lens, if the object is at focus, the image is formed at: 🔭
- A. At 2F
- B. Infinity
- C. Between F and 2F
- D. On the optical center
Show Answer 🔽
✅ B. Infinity
7️⃣4️⃣ Which of these forms only virtual and diminished images? 🧍♂️➡️📏
- A. Concave mirror
- B. Convex mirror
- C. Convex lens
- D. Plane mirror
Show Answer 🔽
✅ B. Convex mirror
7️⃣5️⃣ When a lens forms an image of the same size as the object, the object is: 🔁
- A. At F
- B. At 2F
- C. Between F and 2F
- D. At optical center
Show Answer 🔽
✅ B. At 2F
7️⃣6️⃣ The speed of light is minimum in: 🐢
- A. Air
- B. Glass
- C. Water
- D. Vacuum
Show Answer 🔽
✅ B. Glass
7️⃣7️⃣ What does a positive sign of magnification indicate? ➕
- A. Real image
- B. Inverted image
- C. Virtual and erect image
- D. Magnified image
Show Answer 🔽
✅ C. Virtual and erect image
7️⃣8️⃣ A concave lens is also called a: ➖🔍
- A. Converging lens
- B. Diverging lens
- C. Real lens
- D. Virtual lens
Show Answer 🔽
✅ B. Diverging lens
7️⃣9️⃣ The image formed by a plane mirror is always: 🪞
- A. Real and inverted
- B. Virtual and magnified
- C. Virtual, erect and same size
- D. Diminished and erect
Show Answer 🔽
✅ C. Virtual, erect and same size
8️⃣0️⃣ If refractive index of medium A is greater than B, then light: ➡️
- A. Speeds up in A
- B. Slows down in B
- C. Slows down in A
- D. Is not refracted
Show Answer 🔽
✅ C. Slows down in A
8️⃣1️⃣ A ray of light incident normally on a surface will: ⬇️
- A. Reflect back
- B. Deviate at 90°
- C. Pass undeviated
- D. Bend towards normal
Show Answer 🔽
✅ C. Pass undeviated
8️⃣2️⃣ The image formed by a concave lens is always: 🔍
- A. Real, inverted and diminished
- B. Virtual, erect and diminished
- C. Virtual, inverted and magnified
- D. Real and same size
Show Answer 🔽
✅ B. Virtual, erect and diminished
8️⃣3️⃣ If the image distance (v) is positive, the image is formed: ➕
- A. On the same side as object
- B. On the opposite side to object
- C. Behind the mirror
- D. In the lens
Show Answer 🔽
✅ B. On the opposite side to object
8️⃣4️⃣ Refractive index of diamond is approximately: 💎
- A. 1.33
- B. 1.5
- C. 2.42
- D. 3.0
Show Answer 🔽
✅ C. 2.42
8️⃣5️⃣ For an object placed between pole and focus of a concave mirror, image is: 🔬
- A. Virtual and erect
- B. Real and diminished
- C. Inverted and same size
- D. At center of curvature
Show Answer 🔽
✅ A. Virtual and erect
8️⃣6️⃣ If the focal length of a lens is -50 cm, its power is: 🧠
- A. +2 D
- B. -2 D
- C. +0.5 D
- D. -0.5 D
Show Answer 🔽
✅ B. -2 D
8️⃣7️⃣ An object is placed at 10 cm in front of a concave mirror with f = -10 cm. Image is formed: 🪞
- A. At infinity
- B. At 10 cm behind mirror
- C. At 10 cm in front of mirror
- D. No image
Show Answer 🔽
✅ A. At infinity
8️⃣8️⃣ Which lens has the highest convergence power? ➕
- A. 2 D
- B. 5 D
- C. 10 D
- D. -5 D
Show Answer 🔽
✅ C. 10 D
8️⃣9️⃣ If the image formed is virtual, erect and magnified, the object must be: 🔎
- A. At center of curvature
- B. At infinity
- C. Between pole and focus
- D. Beyond focus
Show Answer 🔽
✅ C. Between pole and focus
9️⃣0️⃣ Real and inverted image smaller than object is formed when object is: 🎯
- A. At 2F
- B. Between F and 2F
- C. Beyond 2F
- D. Between pole and focus
Show Answer 🔽
✅ C. Beyond 2F
9️⃣1️⃣ What happens when a ray passes from a denser to rarer medium? ⚡
- A. Bends away from normal
- B. Bends towards normal
- C. No deviation
- D. Gets absorbed
Show Answer 🔽
✅ A. Bends away from normal
9️⃣2️⃣ A virtual image can never be: ❌
- A. Seen in a mirror
- B. Captured on a screen
- C. Erect
- D. Magnified
Show Answer 🔽
✅ B. Captured on a screen
9️⃣3️⃣ The object distance for a concave mirror is: ➖
- A. Always negative
- B. Always positive
- C. Always zero
- D. Positive for real object
Show Answer 🔽
✅ A. Always negative
9️⃣4️⃣ If magnification is -3, it means: 🔢
- A. Virtual and inverted
- B. Real, inverted and 3 times bigger
- C. Real and same size
- D. Virtual and 3 times smaller
Show Answer 🔽
✅ B. Real, inverted and 3 times bigger
9️⃣5️⃣ Which of these can produce both real and virtual images? 🎥
- A. Convex mirror
- B. Concave mirror
- C. Concave lens
- D. Plane mirror
Show Answer 🔽
✅ B. Concave mirror
9️⃣6️⃣ In lens formula, the focal length is positive for: ➕
- A. Concave lens
- B. Plane mirror
- C. Convex lens
- D. Both A and C
Show Answer 🔽
✅ C. Convex lens
9️⃣7️⃣ A convex lens of focal length 20 cm has power of: 💡
- A. +5 D
- B. -5 D
- C. +2 D
- D. -2 D
Show Answer 🔽
✅ A. +5 D
9️⃣8️⃣ A ray passing through center of curvature of concave mirror: 🎯
- A. Goes undeviated
- B. Gets refracted
- C. Reflects back along same path
- D. Gets absorbed
Show Answer 🔽
✅ C. Reflects back along same path
9️⃣9️⃣ Which mirror is used in solar furnaces? 🔥
- A. Plane mirror
- B. Concave mirror
- C. Convex mirror
- D. Cylindrical mirror
Show Answer 🔽
✅ B. Concave mirror
💯 The nature of image formed by a convex mirror is always: 🧍♂️➡️📏
- A. Real and inverted
- B. Virtual, erect and diminished
- C. Real and erect
- D. Virtual and magnified
Show Answer 🔽
✅ B. Virtual, erect and diminished