Home › Maharashtra SSC (Class 10) › Physics › Lenses › Through which point of a lens does a ray of ligh…
Through which point of a lens does a ray of light pass without any change in its direction?
AThe principal focus
BThe optical centre
CThe centre of curvature
DThe far focal point
Answer & Solution
Correct answer: B. The optical centre
1. The optical centre (O) is the point on the principal axis through which rays pass undeviated.
2. A ray aimed at the focus or centre of curvature does bend, so those are ruled out.
3. Hence the optical centre is the correct answer.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 7 "Lenses", p.90_
Related questions
The light-sensitive screen at the back of the human eye, on which a real and inverted imagA convex lens of small focal length used as a magnifying glass (simple microscope) forms aAn object placed 60 cm from a lens gives a virtual image 20 cm in front of the lens (on thFor an object 25 cm from a converging lens of focal length 10 cm, the image forms at v ≈ 1A 5 cm tall object is placed 25 cm from a converging lens of focal length 10 cm. What are A 5 cm tall object is placed 20 cm in front of a convex lens of focal length 10 cm, forminA 5 cm tall object is placed 20 cm in front of a convex lens of focal length 10 cm. Using A person suffering from both nearsightedness and farsightedness is given bifocal lenses. W