1529799
Description
Flashcards by jessicalazar, updated more than 1 year ago
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Created by jessicalazar
over 11 years ago
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| Question | Answer |
| Double slit experiment equation | dsinθ = mλ d = distance between the slits m = band position on the screen λ = source |
| Diffraction | Light spreads out after passing through the slit, instead of going in a straight path. |
| Single slit experiment equation | asinθ = mλ a = width of slit |
| Thin films | Provide a means for interference to occur. Light reflecting off the outer and inner boundary of a thin film interfere with each other. |
| Unpolarized light | Light with electric field oscilating in many planes. |
| Polarized light | Light with electric field oscilating in a single plane. |
| Reflection | At a certain polarizing angle, all reflected light is polarized. |
| Scattering | Air molecules scatter light, which becomes polarized. |
| Doppler effect (moving light source or observer) | Observed in astronomy, when stars appear redder/bluer than they really are because they are moving away/toward us. Use the speed of light c. Red shift: source moving away from observer. For blue shift: source moving toward observer. |
| Red shift | - Frequency decreases - Occurs when source and observer is moving away from each other. |
| Blue shift | - Frequency increases - Occurs when source and observer is moving toward each other. |
| Visible light | ~380nm (violet) to ~740nm (red) |
| Laser | Light Amplification by Stimulated Emission of Radiation. |
| Reflection from plane surface | angle of incidence = angle of reflection - Mirrors completely reflect light. - Going from one medium to another results in partial reflection of light. |
| Refraction | The change in direction of light due to a change in its transmission medium. |
| Index of Refraction | n = c/v c= speed of light in vacuum v = speed of light in medium |
| Snell's Law (Law of refraction) | n₁sinθ₁ = n₂sinθ₂ if n₂>n₁ then θ₂<θ₁ (light will bend towards the normal) |
| Dispersion | - Change of index of refraction with wavelength. - Blue light refracts more than red light in a prism. - White light passes through a prism and gets split into colors of the rainbow due to dispersion. |
| Total internal reflection | When θ (incidence) > θ (crit). From a medium of high index of refraction to a medium of low index of refraction. |
| Critical angle for total internal reflection | sin θ(crit) = n₂/n₁ |
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