Flashcards
Electromagnetic Waves - Y11 SACE
Cards in this deck (12)
- 1Electromagnetic SpectrumThe full range of wavelengths of all electromagnetic waves: radio waves, microwaves, infra-red, visible light, ultraviolet, X-ray, Gamma rays.
They are transverse waves made up of oscillating electric and magnetic fields that travel at the speed of light in a vacuum.
(My way of remembering the order is:
Riots Might Involve Violent Uprisings, with formation X-ray-Gamma) - 2The NormalThe line which is perpendicular to the reflecting surface at the point where the ray hits it
- 3Angles are measured from the _________Normal
- 4Law of ReflectionThe angle of incidence is equal to the angle of reflection and the incident ray, reflected ray and normal lie on the same plane
- 5Images only occur on _______________Flat Surfaces
- 6The focus of a Curved MirrorWhere all the rays from a converging (concave) mirror are concentrated, or where they appear to originate after passing through a diverging (convex) mirror
- 7RefractionRefraction is the bending of light, when it his the interface between the 2 media obliquely, as it passes from one medium or depth to another
- 8Refraction is caused by:The change of speed of the waves in the different medium. Refraction towards the normal indicates that the light is slowing down, whilst refraction away from the normal indicates that the light is speeding up
- 9Refractive IndexThe ratio of the speed of light in a vacuum to the speed of light in the medium
- 10Snell's LawAngle of incidence is directly proportional to the sine of the angle of refraction for a particular pair of media
- 11Total Internal ReflectionThe critical angle where total internal reflection prevents the ray from escaping from a higher optical-density medium to a lower optical-density medium.
(The angle of refraction that corresponds to the critical angle is 90 degrees) - 12Total internal reflection can be used to:Transmit signals down optical fibres
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- 12 Science (Physics) Flashcards on Electromagnetic Waves - Y11 SACE, created by Ben Goetze on 22/11/2014.
- Created by
- Ben Goetze · Nov 2014
- Updated
- Apr 18, 2016
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