Electromagnetic spectrum

How many colours are there in the spectrum? A. 4 B. 8 C. 7

7

All electromagnetic waves travel through a vacuum at A. The same speed B. Speeds that are proportional to their frequency C. Speeds that are inversely proportional to their frequency D. None of the above

A

Electromagnetic waves can transfer energy without a(n) A. Medium B. Electric field C. Magnetic field D. Change in either a magnetic or an electric field

A

Electromagnetic waves travel at the constant speed of? A. Light B. Sound C. Energy D. Unknown

A

Longest wavelength of the spectrum A. Radio waves B. UV waves C. Visible light

A

Radio waves have the longest wave length. A. True B. False

A

Wavelengths are measured in? A. Meters & nanometers B. Feet & inches C. Inches & centimeters D. Inches to CM cal

A

Which electromagnetic waves have the shortest wavelengths and highest frequencies? A. Gamma rays B. Radio waves C. X-rays D. Ultraviolet rays

A

A group of wavelengths (or) frequencies is known as A. Group of colors B. Spectrum C. Color band D. None

B

Red has the shortest wavelength. A. True B. False

B

Violet has the longest wavelength. A. True B. False

B

When all the waves are seen together, they make black light. A. True B. False

B

Electromagnetic radiation is emmitted, reflected and absorbed differently. A graph showing this interaction across the electromagnetic spectrum is known as? A. Signed of the sign B. Digital wave C. Spectral signature D. Wave signature

C

Electromagnetic radiations waves are: A. Mechanical B. Longitudinal C. Transverse D. Stationary

C

Radio waves have the lowest? A. Facebook accounts B. Wave turn C. Frequency D. Point of turn

C

Shortest wavelength of the spectrum A. Microwaves B. Infrared waves C. Gamma rays

C

What is visible light composed of? A. Gamma rays B. Radio waves C. Red, orange, yellow, green, blue and violet light D. Radar

C

What type of waves are used to transmit cellular telephone messages? A. Gamma rays B. Radio waves C. Microwaves D. Visible light

C

Why are radio waves used extensively for communication? A. Short wave length B. High frequency C. Long wavelength

C

Electromagnetic waves that you can see are called A. Infrared rays B. Microwaves C. X-rays D. Visible light

D

How much of the electromagnetic spectrum is visible? A. All of it B. None of it C. Most of it D. Only a small part

D

Which waves have some electrical properties and some magnetic properties? A. Longitudinal waves B. Transverse waves C. Mechanical waves D. Electromagnetic waves

D