Question

The focal length of a lens is dependent on
which of the following factors?
1. Medium around the lens.
2. Distance between the light source and
the lens.
3. Colour of light.
1, 3
a.
2, 3
b.
2,1
C.
d. 1, 2, 3​

Answer 1

Answer:

d.1,2,3 is the answer for this question