Critical angle is that incident angle in denser medium for which the angle of refraction is:
Correct answer: A. 0
- A. 0
- B. 45:
- C. -90:
- D. 180:
Explanation
Explanation: The critical angle is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90 degrees, leading to total internal reflection. It occurs when the refracted ray is parallel to the boundary.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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