Object at focus of a convex lens. Image is:
AAt focus
BBetween lens and focus
CAt infinity (parallel rays)
DAt 2f
Answer & Solution
Correct answer: C. At infinity (parallel rays)
**Object at focal point:** rays emerge parallel after lens, image at infinity. Magnification infinite.
Used in collimators and searchlights.
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: