Assertion (A): To see a non-luminous object, a luminous object is required.

Reason (R): Light from a luminous object falls on a non-luminous object and reaches our eyes.

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Q. Which objects can you not see in a dark night−luminous objects or non-luminous objects?

Q. A shadow is formed when
(a) light from a luminous object reaches our eyes.
(b) light from a luminous object reaches our eyes after reflection.
(c) light from a luminous object is prevented from reaching our eyes by another object.
(d) light from a luminous object reaches our eyes after passing through a transparent object.

Q. To see a non-luminous object, light from an source is required.

What is meant by (a) luminous objects, and (b) non-luminous objects? Name two luminous objects and two non-luminous objects. State whether the moon is a luminous object or a non-luminous object.

Choose the correct statements:

Statement 1: We see objects when light emitted from luminous objects enters our eyes.

Statement 2: We see objects when light reflected from the non-luminous objects enters our eyes.

Statement 3: Eyes alone cannot see an object.

Statement 4: Eyes emit light rays in all direction.

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Assertion (A): To see a non-luminous object, a luminous object is required. Reason (R): Light from a luminous object falls on a non-luminous object and reaches our eyes.

Assertion (A): To see a non-luminous object, a luminous object is required.

Reason (R): Light from a luminous object falls on a non-luminous object and reaches our eyes.