EM waves (brief so need to improve later)

What type of waves are em waves?

Tranverse

Through the air or a vacuum what speed to EM waves travel at?

The same speed

What is the order of em waves from lowest frequency and highest wavelength to high frequency and low wavelength?

1. Radio waves

2. Micro waves

3. Infra Red

4. Visible light

5. Ultra violet

6. X-Rays

7. Gamma rays

What is the wavelength of Radio waves?

1m - 10⁴ m

What is the wavelength of micro waves?

10^-2 m

What is the wavelength of infra red?

10^-5 m

What is the wavelength of visible light?

10^-7 m

What is the wavelength of UV?

10^-8 m

What is the wavelength of X-Rays?

10^-10 m

What is the wavelength of gamma rays?

10^-15 m

What are the uses of radion waves?

Mainly for communication:

1. Bluetooth

2. TV and FM radio

What are microwaves used for?

1. Satellites

2. Microwave ovens

What can IR be used for?

Monitor temp:

1. Infrared cameras

Or increase the temp:

1. Electric heaters emits IR to be absorbed by objects

What is Visible light used for?

Optical fibres

Dangers of em waves?

1. Em waves with large wavelengths (gamma or x-rays) can cause gene mutation or cell damage

2. UV radiation can cause damage to surface cells, leading to an increased risk of skin cancer