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Year 9 Science Physics Topic 2 The Electromagnetic Spectrum

Gamma rays High frequency electromagnetic radiation.
X-rays Electromagnetic radiation that has a shorter wavelength than UV but longer than gamma rays.
Ultraviolet Electromagnetic radiation that has a shorter wavelength than visible light but longer than X-rays.
Visible light Electromagnetic waves that can be detected by the human eye.
Infrared Electromagnetic radiation that we can feel as heat.
Microwaves A type of electromagnetic radiation.
Radio waves A part of the electromagnetic spectrum.
Electromagnetic radiation A form of energy transfer, including radio waves, microwaves, infrared visible light, ultraviolet, X-rays and gamma rays.
Electromagnetic spectrum The entire frequency range of electromagnetic waves.
Electromagnetic waves A group of waves that all travel at the same speed in a vacuum and are all transverse.
Vacuum A place where there is no matter at all e.g. no space
DNA Deoxyribose nucleic acid. Chemical that makes up genes and chromosones,the instructions for the cells growth and activity.
Skin cancer A cancer or cancerous tumour on the skin.
Mutations A change in the DNA of a gene.
Penetrate To pierce or pass through.
Illuminate To light up with visible light.
Fluorescent Absorbing radiation of one wave length and re-emitting the energy at different wavelength (usually that it becomes visible).
Fluorescent lamps Lamp that works by fluorescence. It produces ultraviolet radiation which is then absorbed by a coating in the bulb and re-emitted as visible light.
Thermal imaging Photography that uses a detector of infrared radiation.
Optic fibre Glass or plastic strand which can direct light or infrared radiation.
Radiotherapy Cancer treatment in which the patient is given gamma radiation to kill the cancer cells.
Ionising radiation Radiation or certain types of high-energy particles that can cause atoms to become electrically charged (to become ions).
Ion An atom that has become electrically charged.
Radioactive Any material that gives out alpha, gamma or beta radiation.
Alpha particle A type of ionising radiation emitted by a radioactive material.
Beta particles A type of ionising radiation emitted by a radioactive material.
Gamma particles A type of ionising radiation emitted by a radioactive material.
Created by: bookcase
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