Question

The coolest and dimmest space objects emit radiation of longer wavelengths than those we can see. A detector for which type of electromagnetic radiation is most suitable to study cool dim stars?

1. Gamma ray
2. Infrared
3. Ultraviolet
4. X-rays

Answer 1

The answer is 2. Infrared

Answer 2

A detector for infrared radiation is most suitable to study cool dim stars.

Step-by-step explanation:

• Stars that are cool and dim have been observed to emit infrared radiation.

• The wavelength of infrared radiation can range from 700 nanometers to 1 millimeter.

• Radiations with a wavelength as small as this can only be emitted by small, dim and cool stars.

• Thus, a detector for infrared radiation is most suitable to study cool dim stars.