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प्रश्न
A ray of light travelling in a transparent medium of refractive index n falls, on a surface separating the medium from air at an angle of incidents of 45°. The ray can undergo total internal reflection for the following n.
विकल्प
n = 1.25
n = 1.33
n = 1.4
n = 1.5
उत्तर
n = 1.5
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