explain how only student A's focal length is only correct ;why not the others?
(the answer of the question is ONLY A)
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a is the true answer
sanjanashetty30:
but how? can u just explain it please.?
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A is the bcz A has measured from mirror to screen
but how will it be focal length?
bcz A has measured from screen to mirror
sry from mirror to screen
so is the image formed at f?
yes
this has happened because the object is at infinity ?
maybe
k..
thank you
wc
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