Class 10 Exam > Class 10 Notes > Angle of Deviation - Maths, Class 10
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The angle between incident ray and emergent ray of prism is calleda)angle of incidenceb)angle of emergencec)angle of refractiond)angle of deviationCorrect answer is option 'D'. Can you explain this answer?
Ref: https://edurev.in/question/490104/The-angle-between-incident-ray-and-emergent-ray-of-prism-is-calleda-angle-of-incidenceb-angle-of-eme
The angle of deviation through a triangular prism is defined as the angle between the incident ray and the emerging ray (angle δ). It can be shown that when the angle of incidence i is equal to the angle of refraction r' for the emerging ray, the angle of deviation is at a minimum. Show that the minimum deviation angle (δmin = D) is related to the prism angle A and the index of refraction n, by
[Hint: For an isosceles triangular prism, the minimum angle of deviation occurs when the ray inside the prism is parallel to the base, as shown in the figure.]
FAQs on Angle of Deviation - Maths, Class 10
| 1. What is the angle of deviation in optics? |  |
The angle of deviation in optics refers to the angle by which a ray of light is bent or deviated when it passes through a medium, such as a prism. It is measured as the angle between the incident ray and the emergent ray after passing through the medium.
| 2. How is the angle of deviation related to the refractive index? | |
The angle of deviation is directly related to the refractive index of the medium through which the light is passing. The refractive index is a measure of how much the speed of light changes when it enters a medium. As the refractive index increases, the angle of deviation also increases.
| 3. Can the angle of deviation be negative? | |
Yes, the angle of deviation can be negative. This occurs when the emergent ray bends towards the base of the prism instead of away from it. Negative angles of deviation are typically observed when the incident ray is nearly perpendicular to the prism's base.
| 4. How can we calculate the angle of deviation? | |
The angle of deviation can be calculated using the formula:
Angle of deviation = (Angle of incidence + Angle of emergence) - Angle of prism
The angles are measured in degrees. The angle of incidence is the angle between the incident ray and the normal to the surface of the prism, while the angle of emergence is the angle between the emergent ray and the normal. The angle of prism is the angle between the two faces of the prism.
| 5. What is the significance of the angle of deviation in practical applications? | |
The angle of deviation is important in various practical applications of optics. It determines the amount of dispersion that occurs when white light passes through a prism, leading to the separation of different colors. It also helps in understanding the behavior of light in different mediums and the phenomenon of total internal reflection. Additionally, the angle of deviation is used in the design and analysis of optical instruments like spectrometers and telescopes.
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Nov 22, 2024 Last updated |
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