Class 10 Physics Optics The Human Eye And The Colourful World



Four students A, B, C and D performed the experiment to determine the focal length of a concave mirror by obtaining the image of a distant tree on a screen. They measured the distances between the screen and the mirror as shown in the diagrams given below :

The correct value for focal length will be obtained by the student :
(a)
A
(b)
B
(c)
C
(d)
D
Correct answer: (c) 

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