4) A light ray after refraction moves away from the normal. State whether this ray is moving from dense to rare medium or otherwise. 1.Give reason for your answer. 2.Draw the diagram for the same.
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Answer:
(i) Diagram with the path of the ray after reflection is shown above.
(ii) Principle of reversibility of light is used to show the direction of the ray.
Explanation:
Sure. Here is the answer to your question:
* When a light ray moves from a dense medium to a rarer medium, it bends away from the normal. This is because the light travels faster in the rarer medium than in the denser medium.
* The reason why the light ray bends away from the normal is because of Snell's law of refraction. Snell's law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the refractive indices of the two media.
* In the case of a light ray moving from a denser medium to a rarer medium, the refractive index of the rarer medium is less than the refractive index of the denser medium. This means that the sine of the angle of refraction will be less than the sine of the angle of incidence. As a result, the light ray will bend away from the normal.
Here is a diagram showing the refraction of a light ray from a denser medium to a rarer medium:
[Diagram of a light ray refracting from a denser medium to a rarer medium]
The light ray is incident on the interface between the two media at an angle of incidence θ1. The refracted ray bends away from the normal and emerges from the interface at an angle of refraction θ2. The refractive index of the denser medium is n1 and the refractive index of the rarer medium is n2.
I hope this helps! Let me know if you have any other questions.