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प्रश्न
What do you understand by the deviation produced by a prism? Why is it caused?
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उत्तर
Prism-produced Deviation is the bending of a light beam away from its intended path. Ray AB would have followed the path if there had been no prism. ABDF, but the prism has forced the light ray to bend twice in the direction of the prism's base, and the emerging beam EK seems to be coming from DEK.
Cause: When light travels from one medium to another, in this example, from air to a glass prism, its speed changes. This change in speed causes the light to deflect and enter the new medium glass at a different angle.
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संबंधित प्रश्न
One day Chetan’s mother developed a severe stomach ache all of a sudden. She was rushed to the doctor who suggested for an immediate endoscopy test and gave an estimate of expenditure for the same. Chetan immediately contacted his class teacher and shared the information with her. The class teacher arranged for the money and rushed to the hospital. On realizing that Chetan belonged to a below average income group family, even the doctor offered concession for the test fee. The test was conducted successfully.
Answer the following questions based on the above information:
(a) Which principle in optics is made use of in endoscopy?
(b) Briefly explain the values reflected in the action taken by the teacher.
(c) In what way do you appreciate the response of the doctor on the given situation?
How are critical angles related to the refractive index of the medium?
State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.
State one factor on which a critical angle for a given pair of media depends. The critical angle for the glass-air interface is 45° for the yellow light. Will it be equal to, less than or greater than 45° for (i) red light, (ii) blue light?
The adjacent diagram shows two right-angled isosceles prisms A and B. Complete the diagram to show the path of rays P and Q emerging out of the prism B. What principles have you used to complete the diagram?
For a ray of light, the critical angle is minimum when it travels from ______.
Total internal reflection can take place only if light is travelling from ______.
State two differences between normal reflection and total internal reflection.
