alleryTelescope's angular magnification (normal adjustment, image at infinity):
Af_o / f_e
Bf_e / f_o
Cf_o + f_e
Df_o × f_e
Answer & Solution
Correct answer: A. f_o / f_e
M = -f_o/f_e for refracting telescope in normal adjustment.
Long objective focal length, short eyepiece focal length gives high angular magnification.
**Negative sign:** image inverted.
Keep practising Ray Optics
Browse all Ray Optics questions for JEE Advanced, or explore more Physics topics.
Related questions
Complete the lens formulaFind the property that does not match concave mirrorsRefraction — true or false?A ray enters a glass slab at 45°. Glass n = 1.5. Angle of refraction inside glass:For total internal reflection at glass-water interface (n_g = 1.5, n_w = 1.33), critical aFor object at 60 cm from convex lens of f = 20 cm, image is:Magnifying power of simple magnifier (image at near point):Refractive index of medium 1 w.r.t. medium 2 is n₁₂. Then: