A small source of light is to be suspended directly above the centre of a circular table of radius |
|||||||
a) |
|
b) |
|
c) |
|
d) |
|
A small source of light is to be suspended directly above the centre of a circular table of radius |
|||||||
a) |
|
b) |
|
c) |
|
d) |
|
(b) For maximum intensity Applying this condition have get |