alleryFor object at 60 cm from convex lens of f = 20 cm, image is:
AVirtual
BSame size
CAt infinity
DReal, inverted, at v = 30 cm, m = -1/2
Answer & Solution
Correct answer: D. Real, inverted, at v = 30 cm, m = -1/2
1/v - 1/u = 1/f.
u = -60, f = 20: 1/v = 1/20 + 1/(-60) = (3-1)/60 = 1/30 → v = 30 cm.
m = v/u = 30/-60 = -1/2 (real, inverted, half size).
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 aMagnifying power of simple magnifier (image at near point):Refractive index of medium 1 w.r.t. medium 2 is n₁₂. Then:In Young's double slit experiment, fringe width: