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Which one of the following statements is correct? For a hemisphere, the solid angle is measured.  
  • a)
    In radian and its maximum value is π
  • b)
    In degree and its maximum value is 180°
  • c)
    In steradian and its maximum value is 2 π
  • d)
    In steradian and its maximum value is π
Correct answer is option 'C'. Can you explain this answer?
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Statement: For a hemisphere, the solid angle is measured.
a) In radian and its maximum value is
b) In degree and its maximum value is 180
c) In steradian and its maximum value is 2
d) In steradian and its maximum value is

Correct answer: option 'C' (In steradian and its maximum value is 2)

Explanation:

1. Solid Angle:
Solid angle is a measure of how much of the surrounding space is covered by a given object. It is analogous to the concept of angle in two dimensions, but in three dimensions. Solid angle is measured in steradians (sr).

2. Hemisphere:
A hemisphere is a three-dimensional shape that is half of a sphere. It has a curved surface and a flat circular base. The hemisphere is symmetrical about its base and has a maximum height equal to the radius of the base.

3. Solid Angle of a Hemisphere:
The solid angle of a hemisphere is the measure of the amount of space it covers from a specific point in three dimensions. Since a hemisphere is a three-dimensional object, the solid angle is measured in steradians (sr).

4. Maximum Value of Solid Angle:
The maximum value of the solid angle for a hemisphere can be determined by considering the entire surface area of the hemisphere. The hemisphere has a total surface area of 2πr^2, where r is the radius of the base.

To find the solid angle, we divide the surface area by the square of the radius. Therefore, the maximum value of the solid angle for a hemisphere is given by:
Solid Angle = Surface Area / (r^2)

For a hemisphere, the surface area is equal to half the surface area of a sphere, which is 2πr^2. Thus, the maximum value of the solid angle for a hemisphere is:
Solid Angle = (2πr^2) / (r^2)
Solid Angle = 2π

Conclusion:
Therefore, the correct statement is option 'C' that states the solid angle of a hemisphere is measured in steradians (sr) and its maximum value is 2 (2π when expressed in terms of π).
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Which one of the following statements is correct? For a hemisphere, the solid angle is measured.a)In radian and its maximum value is πb)In degree and its maximum value is 180°c)In steradian and its maximum value is 2 πd)In steradian and its maximum value is πCorrect answer is option 'C'. Can you explain this answer?
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