To find the focal length of a concave mirror, Sita should choose which one of the following set-ups?
A. A mirror holder and a screen holder
B. A screen holder and a scale
C. A mirror holder, a screen holder and a scale
D. A screen, a mirror, holders for them and a scale
Answer:D
To find the focal length of a concave mirror, Sita should choose which one of the following set-ups?
A. A mirror holder and a screen holder B. A screen holder and a scale C. A mirror holder, a screen holder and a scale D. A screen, a mirror, holders for them and a scale
Explanation: Screen is used to collect the real image and scale to measure the focal length.