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

external

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internal

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infinite

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None of the above

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Solution

The correct option is A external
We see objects only when light from the object falls on our eye. For non luminous objects (like table, book etc) to be visible, there has to be an external source of light whose light falls on the object, and then gets reflected back towards our eyes.

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Similar questions

We are able to see a non-luminous object kept in a room due to the phenomenon of reflection of light.

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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