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Refraction Bending of light when it passes from one medium to another

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Presentation on theme: "Refraction Bending of light when it passes from one medium to another"— Presentation transcript:

1 Refraction Bending of light when it passes from one medium to another
Refraction occurs because the speed of light depends on the material through which it passes Index of refraction = ratio of the speed of light in vacuum to its speed in the material

2 Refraction of a meter stick upon entering water
Air Water

3 Refraction in a piece of glass
If two surfaces of the glass are parallel, the emerging wave is parallel to incident wave Otherwise the emerging wave and incident wave have different directions

4 Dispersion Dispersion occurs because the index of refraction depends on wavelength Violet light is bent most Red light is bent least

5 The Pink Floyd Diagram

6 Making an image with a TELESCOPE
Aperture Aperture Image

7 Making spectra with a SPECTROSCOPE
Aperture Aperture Image Dispersion

8 Making an image with a TELESCOPE
SLIT SLIT Image

9 Making spectra with a SPECTROSCOPE
SLIT SLIT Image Dispersion

10 Spectral resolution: SLIT SLIT Image Dispersion

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