2nd term Final Test

What makes electromagnetic waves different from mechanical waves?

• no medium required

• medium needed

• light -catalyzed

• space exclusive

what happens to the frequency of a wave as wavelength increases?

• increases

• decreases

• remains constant

• diminishes to zero

Utilized in treating cancer, the radiotherapy

• gamma ray

• x-ray

• visible light

• microwave

Select the correct order of waves on the EMS from low to high energy

• Radio wave, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma

• Visible, Microwave, Infrared, Ultraviolet, X-ray, Gamma, Radio wave

• Gamma, X-ray, Ultraviolet, Visible, Infrared, Microwave, Radio wave

• Microwave, Radio wave, Visible, Infrared, Ultraviolet, X-ray, Gamma

Which has the LONGEST wavelength and, therefore, the LOWEST frequency/energy

• Gamma Rays

• Visible Light

• Ultraviolet

• Infrared rays

High frequency in EM waves equals

• high energy and short wavelength

• low energy and short wavelength

• high energy and long wavelength

• low energy and long wavelength

Wavelength and Frequency are related in that...

• they are always the same

• when one increases, the other decreases (inversely proportional)

• there is no correlation

• they both vary in an irregular pattern

An electromagnetic wave in a vacuum has a wavelength of 680 nm. What is its frequency in Hz?

• 4.41 x 10¹⁴ Hz

• 2.04 x 10²⁰ Hz

• 4.41 x 10⁵ Hz

• 2.04 x 10¹¹ Hz

How fast is a light wave moving through an unknown substance if it has a wavelength of 3.5 x 10^-13 m and a frequency of 8.78 x 10²¹ Hz?

• 3.07 x 10⁹ m/s

• 3.99 x 10^-35 m/s

• 3.07 x 10^-35 m/s

• 3.99 x 10⁹ m/s

The use of electromagnetic waves in

medicine has both healing and damaging

effects. The type of electromagnetic wave

with the greatest energy that can damage

human cell tissue is...

• IR

• UV

• Gamma

• Radio