Same chapter3 marksDifficulty: Medium
Where must an object be placed in front of a converging lens for the image to be virtual, erect and magnified? Name one use of this arrangement.
Refraction through a Lens
3 marksDifficulty: Medium
A person cannot see distant objects clearly. Name the defect, the lens used to correct it, and explain why that lens works.
Original Khojo Papers practice question — not from a past board paper.
Answer
The defect is myopia, or short-sightedness, and it is corrected with a diverging lens. The eye brings parallel rays to a focus in front of the retina, and a diverging lens spreads the rays a little before they reach the eye so that they converge exactly on the retina.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Hypermetropia, the opposite defect, is corrected with a converging lens.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
A diverging lens has a focal length of 20 cm. Find its power.
Refraction through a Lens
Same chapter3 marksDifficulty: Medium
State two differences between the image formed by a converging lens and that formed by a diverging lens for a real object.
Refraction through a Lens
Same chapter3 marksDifficulty: Medium
An object is placed 20 cm from a converging lens of focal length 15 cm. Find the position, nature and magnification of the image.
Refraction through a Lens
Same chapter3 marksDifficulty: Medium
Find the power of a converging lens of focal length 25 cm.
Refraction through a Lens
Same chapter3 marksDifficulty: Medium
Draw a ray diagram to show the image formed by a converging lens when the object is placed between the focus and twice the focal length.
Refraction through a Lens