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What is the solid angle subtended by a h...

What is the solid angle subtended by a hemisphere at its centre?

A

`pi` steradian

B

`2pi` steradian

C

`3pi` steradian

D

`4pi` steradian

Text Solution

Verified by Experts

The correct Answer is:
b
The solid angle subtended by a sphere at its centre is `4pi` steradian. For a hemisphere it is `2pi` steridians.
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