Question

The physical size of the star depends upon __________

(a) Angular size of image

(b) Intensity of image

(c) Colour of image

(d) Shape of image

I had been asked this question in an online interview.

I'd like to ask this question from Stellar Sensor Design topic in chapter Celestial Navigation, Doppler and Altimeter Radars of Avionics

Answer 1

Right option is (a) Angular size of image

The best explanation: The physical size of the star image depends on the angular size of the image and the effective focal length of the telescope:   were d is the physical diameter of the rings in the diffraction image.