When observed from the earth the angular diameter of the sun is 0.5 degree. The diameter of the image of the sun when formed in a concave mirror of focal length0.5 m will be about

Question

TestHub · Accepted Answer

To find the diameter of the image, we use the formula: image diameter = focal length $\times$ angular diameter (in radians).

Angular diameter = $0. 5^{\circ} = 0.5 \times \frac{π}{180}$ radians.

Focal length = $0.5$ m.

Image diameter = $0.5 \times (0.5 \times \frac{π}{180}) \approx 0.00436$ m or $4.36$ mm.

Physics - Geometrical Optics Question with Solution | TestHub

Options:

Doubts & Discussion

JEE Main (2028)

JEE Main + Advanced (1 year 12th class)