Unit 3 (Telescopes): "EM Spectrum"

Question 1

What is the order of the EM Spectrum from least to most energy?

Answer 1

Radio, Micro, Infrared, Visible, Ultra Violet, X-rays, Gamma Rays

Question 2

What is the order of the EM Spectrum from shortest to longest wavelength?

Answer 2

Gamma rays, X-rays, Ultra Violet, Visible, Infrared, Micro, and Radio

Question 3

What is refraction?

Answer 3

Waves are deflected by passing through a medium of varying density.

Question 4

If you are on Earth, what wavelengths of light can you detect from space?

Answer 4

Everything except the X-ray and some UV

Question 5

If you are in space and looking at Earth, what wavelengths of light can you detect?

Answer 5

Radio to VIsible

Question 6

Which EM Wave is related to heat?

Answer 6

Infrared

Question 7

Which part of the EM Spectrum can we see?

Answer 7

Visible Light (Colors)

Question 8

What are the common uses of X-Rays?

Answer 8

For bone fractures/ injuries/ body problems.

Question 9

What kind of light produces an emission spectrum when passed through a prism?

Answer 9

Visible Light

Question 10

Do all sources of light emit emission spectra?

Answer 10

Yes- each different source of light has a different spectrum though

Question 11

Blackbody radiators emit what kind of light?

Answer 11

A continuous spectrum of electromagnetic radiation at all wavelengths

Question 12

Are humans blackbody radiators?

Answer 12

• Yes humans are blackbody radiators
  Blackbody definition: A surface that absorbs all radiant energy falling on it (because it absorbs, it then produces its own light)