Same chapter1 markDifficulty: Easy
The power of a lens of focal length 50 cm is:
Refraction through a Lens
2 marksDifficulty: Easy
State two differences between a real image and a virtual image.
Original Khojo Papers practice question — not from a past board paper.
Answer
A real image can be caught on a screen while a virtual image cannot; a real image formed by a lens is inverted while a virtual image is erect.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Real images are formed by the actual intersection of refracted rays; virtual images are formed where the rays only appear to meet.
Related questions
From the same topic and chapter, at a similar level.
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
Find the power of a converging lens of focal length 25 cm.
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
A diverging lens has a focal length of 20 cm. Find its power.
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Same chapter4 marksDifficulty: Hard
An object 3 cm tall is placed 15 cm from a converging lens of focal length 10 cm. Find the position, size and nature of the image.
Refraction through a Lens