The Electromagnetic Spectrum

Question 1

State the order of the electromagnetic spectrum with the longest wavelength component first.

Answer 1

Radio, Microwave, Infrared, Visible, Ultraviolet, X-Ray, Gamma Ray

Question 2

State what happens to frequency as wavelength increases in the electromagnetic spectrum.

Answer 2

Frequency decreases.

Question 3

State which colour in the visible section has the largest wavelength.

Answer 3

Red

Question 4

State which colour in the visible section has the largest frequency.

Answer 4

Violet

Question 5

State a detector of Radio waves.

Answer 5

Aerial

Question 6

State a detector of Microwaves.

Answer 6

Aerial

Question 7

State a detector of Infrared.

Answer 7

photodiode

Question 8

State a detector of the visible spectrum.

Answer 8

Photographic Film

Question 9

State a detector of Ultraviolet waves.

Answer 9

Fluorescent chemicals

Question 10

State a detector of X-Rays.

Answer 10

Photographic Film

Question 11

State a detector of Gamma Rays.

Answer 11

Geiger Tube and Counter

Question 12

State a source of Radio waves.

Answer 12

Electrical circuits/stars

Question 13

State a source of Microwaves.

Answer 13

Electrical circuits/stars

Question 14

State a source of Infrared.

Answer 14

All hot objects/stars

Question 15

State a source of the visible spectrum.

Answer 15

Stars

Question 16

State a source of Ultraviolet waves.

Answer 16

Stars

Question 17

State a source of X-Rays.

Answer 17

Man-made sources/some stars

Question 18

State a source of Gamma Rays.

Answer 18

Nuclear decay/Cosmic rays

Question 19

State a use of Radio waves.

Answer 19

Communication

Question 20

State a use of Microwaves.

Answer 20

GPS or Satellite Communication

Question 21

State a use of Infrared.

Answer 21

Night Vision/Remote Controls

Question 22

State a use of the visible spectrum.

Answer 22

Laser Surgery/Photography

Question 23

State a use of Ultraviolet waves.

Answer 23

Treating Skin Conditions/Sterilising Medical Instruments

Question 24

State a use of X-Rays.

Answer 24

Detecting broken bones

Question 25

State a use of Gamma Rays.

Answer 25

Radioactive Tracers/Treatment of Cancer

Question 26

State what happens to wave energy as frequency increases in the electromagnetic spectrum.

Answer 26

Energy increases