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1. The problem: A plane mirror of length 2m is kept along the line y=x as shown in the figure. An insect having velocity of 4
cm/s is moving along xaxis from far away. The time span for which the insect can see its image will be:
A)50 sec B)25 sec C)25√2 sec D)50√2 sec
2.The answer given is D50√2 sec
3. The Attempt at a Solution : I've tried to solve it by using laws of reflection. but i cant get the answer that is given from the options. So please help!
My solution was : the insect can see its image form the bottom of the mirror ie., for 2m for xaxis . so the time span is 2m=200 cm
time span= 200/4=50sec
but why is the answer 50√2 .
Have i done anything wrong?
A)50 sec B)25 sec C)25√2 sec D)50√2 sec
2.The answer given is D50√2 sec
3. The Attempt at a Solution : I've tried to solve it by using laws of reflection. but i cant get the answer that is given from the options. So please help!
My solution was : the insect can see its image form the bottom of the mirror ie., for 2m for xaxis . so the time span is 2m=200 cm
time span= 200/4=50sec
but why is the answer 50√2 .
Have i done anything wrong?
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