Physics
Complete the following sentence:
If half part of a convex lens is covered, the focal length …….. change, but the intensity of image ………
Related Questions
What do you mean by focal plane of a lens?
State the condition for each of the following :
(a) a lens has both its focal lengths equal.
(b) a ray passes undeviated through the lens.
Complete the following sentence:
A convex lens is placed in water. Its focal length will ………
Complete the following sentence:
The focal length of a thin convex lens is …….. than that of a thick convex lens.