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) |

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