Question

What did classical physics predict would happen to the light given off by an object as its temperature increased?

A. The frequency of the light would increase from visible light into the ultraviolet range.

B. The color of the light would change from violet to red, and the brightness would decrease.

C. The color of the light would not change, but the brightness would increase.

D. The frequency of the light would increase from visible light into the infrared range.

Answer 1

The correct option is C.
When the temperature of an object that is giving off light is increased, the particles in the object will move at a faster rate and there will be increased vibration of these molecules. This will makes the object to emit more light and to shine more brightly. Thus, the higher the temperature, the brighter the light that will be emitted. 

Answer 2

The frequency of light would increase from visible light into the ultraviolet range

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