Question

a) The observations of an experiment to find the focal length of a mirror are
given below. (Measurements are given by observing sign convention)
S.No. 1
2 34 4 5
Object -30cm -40cm -60cm -20cm -10cm
distance(u)
Image 1-60cm -40cm -30cm Infinite +20cm
distance(v)
What is the mirror used in this experiment? How can you say?
ii) What is the focal length of the mirror? How can you say without doing
any calculations?
In which observation the object is kept at principal focus?
What is the magnification of image when the object is kept at 30cm
distance in front of the mirror?​

Answer 1

Answer:

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