Physics: P13 - The Electromagnetic Spectrum

Order of electromagnetic spectrum

\-Radiowaves

\-Microwaves

\-Infrared radiation

\-Visible light

\-Ultraviolet

\-X-ray

\-Gamma ray

Radiowave uses

\-Radios

\-TV stations

Microwave uses

\-Microwaves

\-Satellites

Infared radiation uses

\-Thermal imaging

\-Toasters

Visible light uses

\-Cameras

\-Fireoptics

Ultraviolet uses

\-Sunbeds

\-Detecting forgery

X-ray uses

\-X-rays

\-Bombs

Gamma rays uses

\-Radiotherapy

\-Sterilisation

What are electromagnetic waves?

Transverse waves that transfer energy from the source of the waves to an absorber

What part of the electromagnetic spectrum has the longest wavelength?

Radio waves

What part of the electromagnetic spectrum has the highest frequency?

Gamma rays

Why does refraction happen?

The difference in velocity of the waves in different substances

How are radio waves produced?

Oscillations in electrical circuits

How do radio waves induce oscillations in an electrical circuit?

When radio waves are absorbed they may create an alternating current with the same frequency as the radio wave itself

What is radiation dose?

The measure of the risk of harm resulting from an exposure of the body to the radiation

What do the hazardous affects of UV, X-Rays and Gamma rays depend on?

-Type of radiation

-Size of the dose