Question

calculate solid angle subtended by circurcia area of radius 3m at a point 9 m long from area ​

Answer 1

Answer:

-2

Explanation:

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Question

Bookmark The solid angle subtended by the periphery of an area 1cm

2

at a point situated symmetrically at a distance of 5 cm from the area is

A

2×10

−2

steradian

B

4×10

−2

steradian

C

6×10

−2

steradian

D

8×10

−2

steradian

Medium

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Solution

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Correct option is

B

4×10

−2

steradian

Given data,

Area=1cm

2

Distance=5cm

Solid angle Ω=?

We know the formula

Solid angle Ω=

(Radial distance)

2

Area

=

(5cm

2

)

1cm

2

=

25

1

=4×10

−2

steradian

The solid angle is for 3−D figure like spere, cone, etc and plane angle is for plane objects or 2−D figure like circle,arc etc.

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