SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 12

MEDIUM

7th Jammu and Kashmir Board

IMPORTANT

Earn 100

David is observing his image in a plane mirror. The distance between the mirror and his image is $4 m$ . If he moves $1 m$ towards the mirror, then the distance between David and his image will be

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Important Questions on Light

EASY

7th Jammu and Kashmir Board

IMPORTANT

SCIENCE A TEXTBOOK FOR CLASS 7>Chapter 15 - Light>EXERCISES>Q 13

The rear-view mirror of a car is a plane mirror. A driver is reversing his car at a speed of

2 m s^{- 1}

. The driver sees in his rearview mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be