# Electromagnetic radiation - PowerPoint PPT Presentation

1 / 9
Title:

Description:

### 3.5 Electromagnetic radiation Wave diagram Electromagnetic radiation radiation travels in waves Wavelength: ( ) distance between 2 waves Measured in meters (m ... – PowerPoint PPT presentation

Number of Views:248
Avg rating:3.0/5.0
Slides: 10
Provided by: brip152
Category:
Tags:
Transcript and Presenter's Notes

1
3.5

2
Wave diagram
3
• Wavelength (?) distance between 2 waves
• Measured in meters (m)
• Frequency number of waves to pass a point in 1
second.
• Measured in cycles per second (1/s) (s-1) or
hertz (hz)

4
• longer waves have low frequency
• shorter waves have high frequency
• (UV, x-rays)

5
Calculating wavelength, frequency.
• c speed of light
• 3.0 x 108 m/s
• ? wavelength (m)
• v frequency (1/s)

6
Calculating wavelength
• What is the wavelength of electromagnetic
radiation with a frequency of 1x106 s-1 ?
• Calculate the wavelength of electromagnetic
radiation with a frequency of 1x 1019 hz ?

7
Light
• A narrow range of electromagnetic radiation.
• Wavelengths 400 x 10 -9m ? 700 x 10 -9m
• (400 nanometers? 700 nanometers)

8
Determining Wavelength ?
• ? c/ v cspeed of light vfrequency ?
wavelength
• Wavelength speed of light divided by the
frequency
• Speed of light is 3.00 x 108 m/s

9
? c/? Problems
• Calculate the frequency (?) of a wave with a
wavelength (?) of
• 1.5 x 10-3 m
• Calculate the wavelength(?) of a wave with a
frequency of
• 4.0 x 10 5 1/s