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SITEMAP   Physics: ELECTROMAGNETIC RADIATION types, properties, uses, dangers

UK GCSE level age ~14-16 ~US grades 9-10 Scroll down, take time to study content or follow links

Electromagnetic radiation - introduction to EM waves - Types, properties, uses and the spectrum of visible light

Doc Brown's Physics exam study revision notes


Sub-index for this section on the electromagnetic spectrum

1. General survey of electromagnetic radiations, learning objectives

2. Examples of wave equation calculations for electromagnetic radiation

All the properties, uses and dangers of electromagnetic radiations are described in detail in the individual Parts 3. to 9. listed below, noting the trend of increasing frequency, decreasing wavelength and increasing energy of photons:

3. The properties and uses of radio waves

4. The properties and uses of microwaves

5. The properties and uses of infrared radiation

6. The properties and uses of visible light

7. The properties and uses of ultraviolet light

8. The properties and uses of X-rays

9. The properties and uses of gamma radiation

10. Excitation of atoms, ionisation, more on dangers of ionising radiation


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WAVES - electromagnetic radiation, sound, optics-lenses, light and astronomy revision notes index

General introduction to the types and properties of waves, ripple tank expts, how to do wave calculations

Illuminated & self-luminous objects, reflection visible light, ray box experiments, ray diagrams, mirror uses

Refraction and diffraction, the visible light spectrum, prism investigations, ray diagrams explained

Electromagnetic spectrum, sources, types, properties, uses (including medical) and dangers

The absorption and emission of radiation by materials - temperature & surface factors including global warming

See also Global warming, climate change, reducing our carbon footprint from fossil fuel burning

Optics - types of lenses (convex, concave, uses), experiments and ray diagrams, correction of eye defects

The visible spectrum of colour, light filters and explaining the colour of objects 

Sound waves, properties explained, speed measure, uses of sound, ultrasound, infrasound, earthquake waves

The Structure of the Earth, crust, mantle, core and earthquake waves (seismic wave analysis)

Astronomy - solar system, stars, galaxies and use of telescopes and satellites

The life cycle of stars - mainly worked out from emitted electromagnetic radiation

Cosmology - the Big Bang Theory of the Universe, the red-shift & microwave background radiation


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