Reflection of light

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Reflection of light

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1) When a plane mirror is rotated through a certain angle, the reflected ray turns through twice as much and then size of the image will be

2 points

(a) doubled

(b) halved

(d) remains same

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(2) Which statement is true for the reflection of light?

2 points

(a) The angle of incidence and reflection are equal.

(b) The reflected light is less bright than the incident light.

(d) The beams of incident light after reflection diverge at unequal angles.

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3) A beam of light incident on a plane mirror forms a real image on reflection. The incident beam is

2 points

a) parallel

(b) convergent

(d) coincident

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4) Under which of the following conditions a concave mirror can form an image larger than the actual object?

2 points

(a) When the object is kept at a distance equal to its radius of curvature

(b) When object is kept at a distance less than its focal length

(d) When object is kept at a distance greater than its radius of curvature

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(5) A full length image of a distant tall building can definitely be seen by using

2 points

(a) a concave mirror

(b) a convex mirror

(d) both concave as well as plane mirror

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6) Image formed by plane mirror is

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a. Real and erect

b. Real and inverted

c. Virtual and erect

d. Virtual and inverted

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(7) The radius of curvature of a mirror is 20cm the focal length is

2 points

a. 20cm

b. 10cm

c. 40cm

d. 5cm

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8) Which of the following mirror is used by a dentist to examine a small cavity?

2 points

(a) Convex mirror

(b) Plane mirror

(d) Combination of convex and concave mirror

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9) As light travels from a rarer to a denser medium it will have

2 points

(a) increased velocity

(b) decreased velocity

(d) both (b) and (c)

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10) A full length image of a distant tall building can definitely be seen by using

2 points

(a) a concave mirror

(b) a convex mirror

(d) both concave as well as plane mirror

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