If you create a spectrum with a prism as Newton did and then probe the temperature with thermometers that you have kept in the dark,you will find that the thermometer will show a temperature rise when placed:
A) in the visible part of the spectrum but nowhere else.
B) in the visible part of the spectrum and in the invisible region just beyond the red but nowhere else.
C) in the visible part of the spectrum and in the invisible region just beyond the violet but nowhere else.
D) anywhere from the invisible region beyond the red, through the visible, through the invisible region beyond the violet.

Question

Quizplus · Accepted Answer

The thermometer will show a temperature rise anywhere from the invisible region beyond the red, through the visible, through the invisible region beyond the violet. This is because the thermometer is measuring the amount of energy being emitted in the form of heat, and all colors on the spectrum emit energy in different amounts. While the visible part of the spectrum emits the most energy, there is still some energy being emitted in the invisible regions beyond the red and violet. Therefore, the thermometer will show a temperature rise in all these regions.

If You Create a Spectrum with a Prism as Newton