Question

Find out the expression for magnifying power of an Astronomical telescop​

Answer 1

Answer:

D. 102 cm

Explanation:

Hint: A telescope is an optical device used to look at distant objects like a star, a planet, or a distant tree etc. The magnification power of this telescope is given as m=−f∘fe . And the length of telescope in normal adjustment i.e., when both object and image are at infinity is given byfu+fe=L

Answer 2

The magnitude (M) of a star telescope is given:

• This is because the object is infinite and that is why the reduced angle of the object in the eye can be considered as the angle obtained by the object in its target.
• M = b / a.
• The magnitude of the star telescope for standard adjustment is 10 and the length of the telescope is 110 cm.
• The ability to magnify a telescope when an image is made is at least a distinct distance from the normal eye.
• In general fixation the final image is in infinity, in order to have the maximum magnification, it should be as large as possible while a few should be kept small.
• The magnification capacity is small and its viewing area is small.