Que 1. Image formed by plane mirror is
(a) Real and erect
(b) Real and inverted
(c) Virtual and erect
(d) Virtual and inverted
Que 2. A concave mirror gives a real, inverted and same size image if the object is placed.
a) At F
b) At infinity
c) At C
d) Beyond C
Que 3. An object is placed at distance of 0.25 m in front of a plane mirror. The distance between the object and image will be
a) 0.25 m
b) 1.0 m
c) 0.5 m
d) 0.125 m
Que 4. The radius of curvature of a mirror is 20 cm,the focal length is
a) 20 cm
b) 10 cm
c) 40 cm
d) 5 cm
Que 5. A ray of light that strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strike a second plane mirror QR placed at right angle to the first mirror. The angle of reflection at the second mirror is:
a) 30°
b) 45°
c) 60°
d) 90°
Que 6. A concave mirror produces a magnification of +4. The object is placed:
a) At the focus
b) Between focus and centre of curvature
c)Between focus and pole
d) Beyond the centre of curvature.
Que 7. The angle of incidence for a ray of light having zero reflection angle is:
a) 0°
b) 30°
c) 45°
d) 90°
Que 8. The laws of reflection hold good for
a) Plane mirror only
b) Concave mirror only
c) Convex mirror only
d) All mirrors irrespective of their shape
Que 9. In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
a) Concave mirror only
b) Convex mirror only
c) Convex lens only
d) Concave mirror, convex mirror, concave lens and convex lens.
Que 10. Image formed by reflection from a convex mirror is
a) Real and inverted
b) Virtual erect and diminished
c) Real and erect
d) Virtual erect and magnified
Que 11. A point object is placed at distance of 20 cm from a convex mirror of focal length 20 cm. The image will form at:
a) At Infinity
b) At focus
c) At the pole
d) Behind the mirror
Que 12. Focal length of concave mirror is
a) negative
b) positive
c) depends on the position of object
d) depends on the position of image
Que 13. A spherical mirror and spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be
a) Both concave
b) Both convex
c) The mirror is concave and the lens is convex
d) The mirror is convex and the lens is concave.
Que 14. Which mirror can produce a virtual, erect and magnified image of an object?
a) concave mirror
b) convex mirror
c) plane mirror
d) both concave and convex mirrors.
Que 15. If the images is formed in front of the mirror, then the image distance will be
a) Positive negative depending on the size of the object
b) Neither positive nor negative
c) positive
d) negative
Que 16. If an incident ray passes through the focus,the reflected ray will
a) pass through the pole
b) be parallel to the principal axis
c) retrace its path
d) pass through the centre of curvature.
Que 17. Minimum reflected rays required for the formation of image is ……..
a) 3
b) 4
c) 5
d) 2
Que 18. Which of the following materials cannot be used to make a lens?
a) Water
b) Glass
c) Plastic
d) Clay
In assertion/ reason question the options given are:
Study the two statements labelled as Assertion (A) Reason (R).
Point out if:
a) Both, A and R, are true and R is the correct explanation of A
b) Both, A and R, are true but R is not the correct explanation of A
c) if A is true but R is right
d) if A is false but R is true
Que. Assertion and Reason
Assertion- Concave mirror is used as rear – view mirror.
Reason- Concave mirror converging in nature.
a)
b)
c)
d)
Que. Assertion and Reasoning
Assertion– Focal length of plane mirror is infinity.
Reason– Plane mirror forms inverted image.
a)
b)
c)
d)
Class 10 Science MCQ’s Chapter 9 Light: Reflection and Refraction
Q. The laws of reflection hold true for[CBSE 2020]
(a) plane mirror only
(b) concave mirror only
(c) convex mirror only
(d) all reflecting surface
Q. The angle of reflection is equal to the angle of incidence
(a) always
(b) sometime
(c) under special condition
(d) never
Q. The image of an object formed by a plane mirror is
(a) Virtual
(b) Real
(c) Diminished
(d) Upside-down
Q. A ray of light is incident on a plane mirror making an angle of 90° with the mirror surface. The angle of reflection for this rays of light will be
(a) 45°(b) 90° (c) 60°(d) 0°
Q. The image formed by a spherical mirror is virtual. The mirror will be
(a) Concave(b) Convex(c) Either concave or convex(d) none of these
Q. If a lens and spherical mirror both have a focal length of -15 cm, then it may be concluded that [CBSE Term I 2021-22]
(a) both are concave(b) The lens is concave and the mirror is convex(c) The lens is convex and the mirror is concave(d) Both are convex
Q. A student determines the focal length of a device ‘A’ by focussing the image of a far off object on a screen placed on the opposite side of the object. The device ‘A’ is [CBSE Term I 2021-22]
(a) concave lens (b) convex mirror(c) convex lens(d) convex mirror
Q. The focal length of a small concave mirror is 2.5 cm. In order to use this concave mirror as a dentist’s mirror, the distance of tooth from the mirror should be
(a) 2.5 cm(b) 1.5(c) 4.5(d) 3.5
Q. Which of the following ray diagrams is correct for the ray of light incident on concave mirror as shown in figure?
(a) Figure A(b) Figure B(c) Figure C(d) Figure D
Q. A convex mirror used for a rear-view on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the magnification of bus.(a) 0.32(b) 0.23(c) 0.87(d) 1.15Q. The mirror formula holds for
(a) Concave mirror(b) Convex mirror(c) Plane mirror(d) All of these ✓
Q. Which of the following materials cannot be used to make a lens?
(a) Water (b) Glass (c) Plastic(d) Clay
Q. Where should an object be placed in front of a convex lens to get a real image of the same size of the object
(a) At principal focus of the lens(b) At twice the focal length(c) At infinity(d) Between the optical centre of the lens and its principal focus.
Q. Light travels fastest in(a) vacuum(b) air(c) glass (d) diamond
Q. Refractive index of glass with respect to air is 3/2. What is the refractive index of air with respect to glass?
(a) 2/3(b) 1(c) zero(d) (3/2)²
Q. The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. According to new cartesian convention, if the image is three times the size of the flame, then the lens is [CBSE Term I 2021-22]
(a) Concave and magnification is + 3(b) Concave and magnification is -3(c) Convex and magnification is -3(d) Convex and magnification is + 3
Q. Power of convex lens of focal length 50 cm is
(a) – 2D(b) -½ D(c) 2 D(d) ½ D
Q. Convex lens produces an image of an object on a screen with a magnification of ½ . When the lens is moved 30 cm away from the object, the magnification of the image is 2. The focal length of the lens is
(a) 20 cm(b) 25 cm(c) 30 cm(d) 35 cm
Q. If the refractive index of glass is 1.5 and speed of light in air is 3 × 10⁸ m /s. The speed of light in glass is
(a) 2 × 10⁸ m /s(b) 2.9 × 10⁸ m /s(c) 4.5 × 10⁸ m /s(d) 3 × 10⁸ m /s
Q. An object 4 cm in height is placed at a distance of 10 cm from a convex lens of focal length 20 cm. The position of image is
(a) -20 cm ✓(b) 20 cm(c) – 10 cm(d) 10 cm
Q. An object is placed 50 cm from a concave lens and produces a virtual image at a distance of 10 cm in front of lens. The focal length of lens is
(a) – 25 cm(b) – 12.5 cm(c) 12.5 cm(d) 10 cm ✓
Q. A convex lens forms an image of magnification -2 of the height of image is 6 cm, The
height of object is
(a) 6 cm✓(b) 4 cm(c) 3 cm(d) 2 cm
Q. A convex lens of focal length 5 cm, the power of lens is
(a) 20 D(b) – 20 D✓(c) 90 D(d) – 5 D