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प्रश्न
| A ray of light travels from a denser to a rarer medium. After refraction, it bends away from the normal. When we keep increasing the angle of incidence, the angle of refraction also increases till the refracted ray grazes along the interface of two media. The angle of incidence for which it happens is called critical angle. If the angle of incidence is increased further the ray will not emerge and it will be reflected back in the denser medium. This phenomenon is called total internal reflection of light. |
A ray of light travels from a medium into the water at an angle of incidence of 18°. The refractive index of the medium is more than that of water and the critical angle for the interface between the two media is 20°. Which one of the following figures best represents the correct path of the ray of light?
पर्याय
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उत्तर
Explanation:
The incidence angle is smaller than the critical angle. The refracted light will therefore deviate from the normal due to normal refraction from denser to rarer material.
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संबंधित प्रश्न
How does the refractive index of a transparent medium depend on the wavelength of incident light used ?
When light is refracted into a medium, ______________ .
Which equation is Snell’s law for refraction between two media?
How does the angle of refraction compare with the angle of incidence for a denser-to-rarer transition when refraction occurs?
In which medium does light travel faster: a rarer medium or the denser medium with which it is compared?
At the critical angle, what are the angle of incidence and the angle of refraction?
What does Snell’s law become at the critical angle?
Which value simplifies Snell’s law at the critical angle?
After using \[\sin 90^\circ=1\], which equation relates the critical angle to the refractive indices?
When \[i=i_c\], what is the angle of refraction?
