If you are to determine the focal length of a convex lens, you should have [Outside Delhi 2012]
A. a convex lens and a screen
B. a convex lens and a lens holder
C. a lens holder, a screen holder and a scale
D. a convex lens and a screen, holders for them and a scale.
Answer:D
If you are to determine the focal length of a convex lens, you should have [Outside Delhi 2012]
A. a convex lens and a screen B. a convex lens and a lens holder C. a lens holder, a screen holder and a scale D. a convex lens and a screen, holders for them and a scale.
Explanation: Screen is used to collect the real image and scale to measure the focal length.