PHYSICS
JAMB 2020 - Question 20
Physics 2020 JAMB Past Questions - Question 20: A man stands 4m in front of a plane mirrow. if the mirrow is moved 1m towards the man, the distance between him and his new image is
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
A
Explanation
In a plane mirror, image distance = object distance u=v=3m
When the mirror is moved 1m towards the man, the distance between him and his new image will be 6m. This is because when the mirror is moved, the distance between the man and the mirror decreases by 1m, and the image will move the same distance, resulting in a total change of 2m (1m towards the mirror and 1m away from the man). Therefore, the new distance will be 4m (original distance) + 2m (change) = 6m.
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