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  • What happens to the intensity of light from a bulb if the distance from the bulb is doubled? As a laser beam travels across the length of a room, its intensity essentially remains constant.

What happens to the intensity of light from a bulb if the distance from the bulb is doubled? As a laser beam travels across the length of a room, its intensity essentially remains constant. What geometrical characteristics of the LASER beam is responsible for the constant intensity which is missing in the case of light from the bulb?

Answers (1)

When the distance is doubled, the intensity of light becomes one-fourth.

Following are the geometrical characteristics of the LASER those missing in the case of normal light from the bulb:

a) unidirectional

b) monochromatic

c) coherent light

The above characteristics are missing in the case of light from the bulb

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