Question

One scientist is using an electromagnetic wave to map the dust between stars. The electromagnetic wave has shorter wavelength than radio waves but longer wavelength than visible light. What electromagnetic wave is the scientist using?

X-ray

Infrared light

Gamma ray

Ultraviolet radiation

Answer 1

Infrared light

Step-by-step explanation:

The distance between two consecutive crests or troughs is called the wavelength of electromagnetic waves.

The wavelength of radio wave is maximum and for gamma rays it is minimum.

The electromagnetic wave that has shorter wavelength than radio waves but longer wavelength than visible light is infrared light.

For radio waves,
`\lambda=10^3\ m`

For infrared light,
`\lambda=10^(-5)\ m`

For visible light,
`\lambda=10^(-6)\ m`

Hence, the correct option is (b) '' infrared light ''

Answer 2

The correct answer is Infrared light

It is also found under the name IR lights. Although it's technically invisible, it can still be seen with machinery up to at least 1050 nm in experiments.