The rear view mirror of a car is a plane mirror . The driver can see the image of a bus park behind the his car in the rear view mirror . If the driver reverses the car at a speed of 0.75 m/s , at which speed the image of bus will appear to approach the car driver ?
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Answer:
0.75m/s
Explanation:
plane mirror has a focal length of infinity
the distance between the mirror and object is equal to the distance between the mirror and the image
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2
Answer:
The speed of the car is 2 m/s which means the car is approaching the truck with a speed of 2 m per second. The distance between the car and truck will decrease at a double rate. This is because the image of the truck will travel a distance twice the distance travelled by the car in equal time. Hence, the image of the truck will appear to approach the driver with the speed of 2 ×2 = 4 m/s
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