A source is at 4m height above the centre of a circular table of a circular table of radius 3m. The ratio of illuminance at and
will be
a) |
|
b) |
|
c) |
1 |
d) |
|
A source is at 4m height above the centre of a circular table of a circular table of radius 3m. The ratio of illuminance at and
will be
a) |
|
b) |
|
c) |
1 |
d) |
|