Q)
(chatquestion)...mirror
raphs
n (m)
le of
(4) Both (1) and (2)
40 Diameter of aperture of a plano-convex lens is 8 cm
and its thickness at center is 4 mm. If speed of light
9.
x10 m/s, then focal
5
in the material of lens is
62 xio8
length of the lens will be
ui
(1) 30 cm
(2) 20 cm
(3) 10 cm
(4) 15 cm
41. Light takes time (t,) to travel a distance 'a' in
medium (1) and takes time (t) to travel a distance b
b f2
atı
...
