An illumination fiber bundle has a diameter of 5 mm, and the power of a metal ha

Question

An illumination fiber bundle has a diameter of 5 mm, and the power of a metal halide lamp is 250 w The lamp emits light in all directions. If no coupling lens is used, the only way to increase the light into the illumination bundle is to move the bundle closer to the lamp. Suppose the illumination bundle is initially 6 cm from the lamp. What is the power of the light at the distal end? Suppose the distance of the bundle from the lamp is decreased by a factor of 4. By what factor does the power change at the distal end?

Explanation / Answer

Power of the light will not change ,only intensity will change.

So power of light will remain same.Only intensity will change.

(b) power will be same only brightness or intensity wil chANGE

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