An electric lamp is fixed at the ceiling of a circular tunnel as shown is figure. What is the ratio the intensities of light at base and a point on the wall
a) |
b) |
c) |
d) |
An electric lamp is fixed at the ceiling of a circular tunnel as shown is figure. What is the ratio the intensities of light at base and a point on the wall
a) |
b) |
c) |
d) |