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

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
Question
A pencil dipped partially in water appears bent because of:
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Answer

  1. Refraction at water surface
Explanation:
Refraction is a phenomenon in which a light ray incident on a surface separating two transparent media bends at the change of medium.
Snell's law gives the relation between angle of incidence and refraction and the Refractive index of the respective medium.
$\mu_1$sin(i) = $\mu_2$​sin(r)
where, i, r are the angles of incidence and refraction respectively.

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