Home
Class 12
PHYSICS
The refracting angle of a prism is A and...

The refracting angle of a prism is `A` and refractive index of the material of the prism is `cos(A//2)`. The angle of minimum deviation is

A

`90^(@)- A`

B

`180^(@) + 2A`

C

`180^(@) - 3A`

D

`180^(@) - 2A`

Text Solution

Verified by Experts

The correct Answer is:
4
`mu=2/(sin (A/2)) = cot A/2`
sin`(A+delta)/2 = cos A/2`
`(A+delta)/2 = pi/2 - A/2`
`delta = pi - 2A`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE- 4|18 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE- 4 One or more than one correct answer type|13 Videos

  • RAY OPTICS AND OPTICAL INSTRAUMENTS

    NARAYNA|Exercise EXERCISE-2 (H.W)(OPTICAL INSTRUMENTS ( TELESCOPES ))|5 Videos

  • NUCLEI

    NARAYNA|Exercise ASSERTION & REASON|5 Videos

  • SEMI CONDUCTOR DEVICES

    NARAYNA|Exercise Level-II (H.W)|36 Videos

Similar Questions

Explore conceptually related problems

The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A)/(2) . The angle of minimum deviation is

The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A//2). the angel of minimum deviation is

The refracting angle of a prism is A and refractive index of the material of prism is cot(A//2) . The angle of minimum deviation will be

The refracting angle of a prism is A , the refractive index of the material of the prism is cot((A)/(2)) . The angle of minimum deviation is :

(a) If the refracting angle of a prism is 60^@ and the minimum deviation is 30^@ , then find the angle of incidence. (b) A ray of light passes through an equilateral prism such that the angle of emergence is equal to the angle of incidence and each is equal to 3//4^(th) of the angle of prism. Find the angle of deviation. (c) The refracting of a prism is A and the refractive index of the material of the prism is cotA//2 . Find the angle of deviation. (d) The angle of a prism is 60^@ . What is the angle of incidence for minimum deviation? The refractive index of the material of the prism is sqrt2 .

The refracting angle of the prism is 60^@ and the refractive index of the material of the prism is sqrt(3) . Calculate the angle of minimum deviation in degree.

The refractive index of the material of prism sqrt3, then the angle os minimum deviation of prism is

The refractive index of the material of an equilateral prism is 1.6. The angle of minimum deviation due to the prism would be

NARAYNA-RAY OPTICS AND OPTICAL INSTRAUMENTS -EXERCISE- 3
  1. The velocities of light in two different mediums are 2xx10^(8) ms^( -1...

    Text Solution

    |

  2. The critical angle for total internal reflection in diamond is 24.5^(@...

    Text Solution

    |

  3. When a glass lens with mu = 1.47 is immersed in a trough of liquid, it...

    Text Solution

    |

  4. A convex lens of refractive index 3/2 has a power of 2.5^(@). If it is...

    Text Solution

    |

  5. The position of an object placed 5 cm in front of concave mirror of ra...

    Text Solution

    |

  6. The speed of light in media M1 and M2 are 1.5 xx 10^8 m//s and 2.0 xx ...

    Text Solution

    |

  7. A ray of light is incident on a 60^(@) prism at the minimum deviation ...

    Text Solution

    |

  8. A lens haivng focal length and aperture of diameter d forms an image o...

    Text Solution

    |

  9. A Galilean telescope has objective and eye- piece of focal lengths 200...

    Text Solution

    |

  10. A far sighted person has his near point 50 cm. Find the power of lens ...

    Text Solution

    |

  11. A plano-convex lens fits exactly into a plano-concave lens. Their plan...

    Text Solution

    |

  12. For a normal eye, the cornea of eye provides a converging power of 40 ...

    Text Solution

    |

  13. If the focal length of the objective lens is increased then

    Text Solution

    |

  14. The angle of a prism is A . One of its refracting surfaces is silvered...

    Text Solution

    |

  15. In an astronomical telescope in normal adjustment a straight black lin...

    Text Solution

    |

  16. A beam of light consisting of red, green and blue colours is incident ...

    Text Solution

    |

  17. Two identical thin planoconvex glass lenses (refractive index 1.5) eac...

    Text Solution

    |

  18. The refracting angle of a prism is A and refractive index of the mater...

    Text Solution

    |

  19. The angle of incidence for a ray of light at a refracting surface of a...

    Text Solution

    |

  20. An astronomical telesope has objective and eyepiece of focal lengths 4...

    Text Solution

    |