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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments2 Marks
Question
Write the laws of refraction.
✓

Answer

(i) Incident ray, refracted ray and the normal separating both the mediums, lie in the same plane.
(ii) For any two mediums and for light of a certain colour (wavelength), the result of the sine of the angle of incidence and the sine of the angle of refraction is a constant.
If the angle of incidence is $i$ and the angle of refraction is $r$. Then $\sin \frac{\sin i}{\sin r}=$ constant $={ }_1 n_2$.

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