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Grade: 9
        the sun (diameter d) subtends an angle x radians at the pole of a concave mirror of focal length f. what is the diameter of the image of the sun formed by the mirror












8 years ago

Answers : (3)

Fawz Naim
37 Points
							

 

8 years ago
Devasish Bindani
45 Points
							

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so take this

8 years ago
Shivang
13 Points
							
Since the object distance → so, the Image can be assumed to form at the focus. So,
r/f = tan(x/2)
where r is the radius of image, and “x” is the angle substended by the object, i.e. Sun.
So, d = 2r = 2ftan (x/2)
2 months ago
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