We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?a)Dispersionb)Total internal reflectionc)Refractiond)None of the aboveCorrect answer is option 'B'. Can you explain this answer?

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We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?

a)
Dispersion
b)
Total internal reflection
c)
Refraction
d)
None of the above

Correct answer is option 'B'. Can you explain this answer?

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We have a right angled isosceles prism, Its refractive index is 1.5. I...

Critical angle will be, sin⁻¹(1/1.5) = 41.8. The angle of incidence inside the prism will be 45. Since it is more than critical angle, the light ray will be internally reflected.

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We have a right angled isosceles prism, Its refractive index is 1.5. I...

Explanation:

Isosceles prism: It is a type of prism in which both the non-parallel sides are equal in length.

Right-angled isosceles prism: It is a type of isosceles prism in which the two equal angles are 45° each and the third angle is 90°.

Refractive index: It is a measure of how much a ray of light bends when it passes through a material. The refractive index of a material is the ratio of the speed of light in a vacuum to the speed of light in that material.

Scenario: We have a right-angled isosceles prism with a refractive index of 1.5. A ray of light is incident normally on one of the two perpendicular surfaces of the prism.

Phenomenon: We need to determine which phenomenon will take place when the ray of light is incident on the prism.

Total internal reflection: When a ray of light travels from a denser medium to a rarer medium, it bends away from the normal. If the angle of incidence is increased to a certain critical angle, the refracted ray will be at an angle of 90° to the normal. At this critical angle, the refracted ray grazes along the interface between the two media and does not emerge into the rarer medium. Instead, it is totally reflected back into the denser medium. This is called total internal reflection.

Conclusion: In our scenario, since the ray of light is incident normally on the prism, it will not refract. However, if we consider the angle of incidence to be the angle between the incident ray and the normal to the surface, then this angle will be 0°. Since the refractive index of the prism is greater than 1, the critical angle for total internal reflection will be less than 45°. Therefore, when the angle of incidence is increased beyond the critical angle, the ray of light will undergo total internal reflection. Hence, the correct answer is option 'B'.

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We have a right angled isosceles prism, Its refractive index is 1.5. I...

Be coz the angle of incidence is more than the critical angle

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We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?a)Dispersionb)Total internal reflectionc)Refractiond)None of the aboveCorrect answer is option 'B'. Can you explain this answer?

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We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?a)Dispersionb)Total internal reflectionc)Refractiond)None of the aboveCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?a)Dispersionb)Total internal reflectionc)Refractiond)None of the aboveCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for We have a right angled isosceles prism, Its refractive index is 1.5. If we incident a ray normally on one of the two perpendicular surfaces, which of the following phenomenon will take place?a)Dispersionb)Total internal reflectionc)Refractiond)None of the aboveCorrect answer is option 'B'. Can you explain this answer?.

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