NCERT Solutions Curiosity Chapter 11 Chapter opening — In-text Questions

Book page 153 Updated on2026-09-05

Q1.
Does the Moon actually produce its own light? Is moonlight just reflected sunlight?
Answer

No, the Moon does not produce any light of its own. Moonlight is sunlight that the Moon reflects towards us.

The Moon is a non-luminous object. Sunlight falls on the Moon's rocky surface, and a small part of it bounces off and reaches the Earth. That is why we see the Moon shining at night.

Why it happens: Only a body that is very hot or is made to glow (like the Sun, a star or a burning flame) can send out light of its own. The Moon is cold rock — it has no way of making light, so it can only pass on the light it receives.
Did you know? The same is true of the planets. Mars and Venus look like bright stars in the night sky, but they shine only by reflecting sunlight. You read this in the chapter ‘Beyond Earth’ of the Grade 6 textbook Curiosity.
Q2.
Which objects give off their own light?
Answer

Objects that give off their own light are called luminous objects.

Natural sourcesArtificial (man-made) sources
The Sun, the stars, lightningA burning candle, oil lamp, kerosene lamp
Natural fire, red-hot lavaElectric bulb, tube light, LED lamp
Fireflies (glow-worms) and some deep-sea animalsTorch, mobile phone screen, gas lamp

Everything else — the Moon, a mirror, a table, a book, Mars, Venus — is non-luminous. We see these things only because light from a luminous object falls on them and comes to our eyes.

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