EM spectrum Flashcards Preview

BMAT: Physics > EM spectrum > Flashcards

Flashcards in EM spectrum Deck (14):
1

what type of waves are EM?

transverse

2

what speed do they travel at?

speed of light - 3 x 10-8 m/s

3

what are the trends in frequency and wavelength from radiowaves to gamma rays?

increasing frequency
decreasing wavelength

4

use of radiowaves

- broadcasting
- communication

5

uses of microwaves

- cooking
- satellite communications

6

uses of infra red

- heaters
- night vision
- cooking
- remote controls

7

uses of visible light

- photography
- optical fibres

8

uses of ultra violet

- fluorescent lamps

9

uses of x-rays

observing internal structure of objects and materials

10

uses of gamma rays

- sterilising equipment
- diagnosis and cancer treatment

11

dangers of microwaves

- internal heating of body tissue

12

dangers of infra red

skin burns

13

dangers of ultra violet

damage to surface cells and blindness

14

dangers of gamma rays

cancer
cell mutation