Reflection And refraction Test

Result

Reflection And refraction Test - 1

Score
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Rank
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Question 1
1 / -0

An object is initially at a distance of 500 cm from a plane mirror. If the mirror approaches the object at a speed of 2 cm/s, then after 6 seconds, the distance between the object and its image will be

A
476 cm

B
976 cm

C
226 cm

D
150 cm

Solution

In 6 seconds, the distance travelled by the mirror is d = 2 × 6 = 12 cm

Then, the distance between the object and the mirror becomes 500 - 12 = 488 cm

Hence, the distance between the object and its image is 488 × 2 = 976 cm
Question 2
1 / -0

The image formed by a convex mirror of a real object is larger than the object

A
when u < 2f

B
when u > 2f

C
for all values of u

D
for no value of u

Solution

Image formed by the convex mirror is always diminished in nature. It can not be larger than the size of the object.