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Civil Engineering - Elements of Remote Sensing - Discussion

Discussion Forum : Elements of Remote Sensing - Section 2 (Q.No. 8)
Elements of Remote Sensing
8.
Which one of the following statements is correct?
π radians equal to 180°.
The cone subtended by an area on the sphere at the centre, is called the solid angle.
The solid angle is equal to the ratio of the area on the sphere and the square of the radius of the sphere.
The unit of the solid angle is steradian (Sr)
All of these
Answer: Option
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