Explain the procedure of an activity” to find the focal length of
a concave mirror.”
Answers
Answer:
Place the concave mirror on a stand, along the meter scale
such that it is at 5cm mark & facing the object.
Place a screen in front of a mirror & move it backward or
forward till a well defined, sharp, inverted & diminished
image is formed.
Note the position of the screen from the meter scale &
hence find the distance between concave mirror & the
screen.
Record the values in a table as shown here.
The distance between mirror & screen is equal to the focal
length of the mirror.
Repeat the above procedure for two times.
Note the position of the mirror & the screen with the help
of a meter scale & record the focal length.
Calculate the average focal length of the three values
which gives the focal length.
Answer:
Place the concave mirror on a stand, along the meter scale
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