EM Spectrum Exam Review

Which EM waves have the longest wavelength?

• radio

• x-rays

• ultraviolet

• gamma rays

Which EM waves have the shortest wavelength?

• radio

• x-rays

• ultraviolet

• gamma rays

Which EM waves are invisible? (more than one correct answer)

• radio

• visible

• ultraviolet

• gamma rays

Which EM waves are have a SHORTER wavelength than visible?

• radio

• none

• infrared

• x-rays

Which EM waves are have the lowest frequency?

• radio

• none

• infrared

• x-rays

Which EM waves are have the highest energy & are the most dangerous?

• radio

• gamma rays

• infrared

• x-rays

Which color waves have the lowest frequency?

• red

• yellow

• green

• violet

Which color waves have the shortest wavelength?

• red

• yellow

• green

• violet

What happens to frequency when wavelength decreases?

• stays the same

• decreases

• increases

• There is no relationship between wavelength & frequency.

Which type of electromagnetic wave travels fastest through a vacuum?

• radio

• gamma rays

• visible light

• They all travel at the same speed.