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Refraction of light (Part - 6) - Physics Video Lecture - Class 11

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1. What is refraction of light?

Ans. Refraction of light is the bending of light when it passes from one medium to another. It occurs due to the change in the speed of light as it travels from one medium to another, which causes a change in its direction.

2. How does refraction of light occur?

Ans. Refraction of light occurs when light travels from one medium to another medium with a different optical density. The change in optical density causes a change in the speed of light, resulting in the bending of light rays.

3. What is the law of refraction?

Ans. The law of refraction, also known as Snell's law, states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media. Mathematically, it can be represented as: n1 sinθ1 = n2 sinθ2, where n1 and n2 are the refractive indices of the two media, and θ1 and θ2 are the angles of incidence and refraction, respectively.

4. How does refraction affect the apparent depth of an object in water?

Ans. Refraction of light causes a change in the direction of light rays when they pass through different media. When light passes from air to water, it bends towards the normal, making the object appear higher than its actual position. This bending of light leads to the apparent shift in the position of the object, resulting in the apparent depth being different from the actual depth.

5. What is the critical angle in refraction?

Ans. The critical angle in refraction is the angle of incidence in a medium at which the angle of refraction becomes 90 degrees. Beyond this critical angle, the light is totally reflected back into the same medium, a phenomenon known as total internal reflection. The critical angle can be calculated using the formula: θc = sin^(-1)(n2/n1), where n1 and n2 are the refractive indices of the two media.

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Nov 25, 2024 Last updated

Refraction of light (Part - 6) - Physics for Class 112024 is part of Class 11 preparation. The notes and questions for Refraction of light (Part - 6) - Physics have been prepared according to the Class 11 exam syllabus. Information about Refraction of light (Part - 6) - Physics covers all important topics for Class 112024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Refraction of light (Part - 6) - Physics.

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