Home
Class 12
PHYSICS
When two plane mirrors subtend an angle ...

When two plane mirrors subtend an angle `theta` between them, then a ray of light incident parallel to one of them retraces its path afer n reflections such that `ntheta=c` (where c is constant)
The graph between `theta` and n will

A

be continous but not differentiable

B

be continuous & differentiable

C

Not be continous

D

Can't say

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE - 04 (A)|48 Videos
  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE - 04 (B)|15 Videos
  • GEOMETRICAL OPTICS

    ALLEN |Exercise ASSERTION-REASON|40 Videos
  • CURRENT ELECTRICITY

    ALLEN |Exercise EX.II|66 Videos
  • GRAVITATION

    ALLEN |Exercise EXERCISE 4|9 Videos

Similar Questions

Explore conceptually related problems

When two plane mirrors subtend an angle theta between them, then a ray of light incident parallel to one of them retraces its path afer n reflections such that ntheta=c (where c is constant) What is the angle of c?

When two plane mirrors subtend an angle theta between them, then a ray of light incident parallel to one of them retraces its path afer n reflections such that ntheta=c (where c is constant) If the angle between mirrors is 60^(@) . Then light ray retraces its path after n reflections where n is

Two mirrors are inclined at angle theta as shown in figure. Light rays are incident parallel to one of mirrors. Light will start retracing its path after the reflection if

The refractive index of the material of a prism is sqrt2 and the angle of the prism is 30^@ . One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is

Two plane mirrors makes an angle of 120^(@) with each other. The distance between the two images of a point source formed in them is 20 cm . Determine the distance from the light source of the point where the mirrors touch, the light source lies on the bisector of the angle formed by the mirrors.

A cubical block of glass of refractive index n_1 is in contact with the surface of water of refractive index n_2. A beam of light is incident on vertical face of the block. After refraction a total internal reflection at the base and refraction at the opposite face take place. The ray emerges at angle theta as shown. The value of theta is given by

The distance between the two parallel lines is 1 unit. A point A is chosen to lie between the lines at a distance 'd' from one of them Triangle ABC is equilateral with B on one line and C on the other parallel line. The length of the side of the equilateral triangle is

A ray of light travelling with a speed c leaves point 1 shown in figure and is reflected to point 2. The ray strikes the reflecting surface at a distance x from point 1. According to Fermat's principle of least time, among all possible paths between two points , the one actually taken by a ray of light is that for which the time taken is the least (In fact there are some cases in which the time taken by a ray is maximum rather than a minimum). Find the time for the ray to reach from point 1 to point 2.

A ray of light travelling with a speed c leaves point 1 shown in figure and is reflected to point 2. The ray strikes the reflecting surface at a distance x from point 1. According to Fermat's principle of least time, among all possible paths between two points , the one actually taken by a ray of light is that for which the time taken is the least (In fact there are some cases in which the time taken by a ray is maximum rather than a minimum). Which of the following statement is in accordance with Fermat's principle

A ray of light travelling with a speed c leaves point 1 shown in figure and is reflected to point 2. The ray strikes the reflecting surface at a distance x from point 1. According to Fermat's principle of least time, among all possible paths between two points , the one actually taken by a ray of light is that for which the time taken is the least (In fact there are some cases in which the time taken by a ray is maximum rather than a minimum). Under what condition is time taken least?

ALLEN -GEOMETRICAL OPTICS-Comprehension Based Questions
  1. The efficiency of a heat engine is defined as the ratio of the mechani...

    Text Solution

    |

  2. The efficiency of a heat engine is defined as the ratio of the mechani...

    Text Solution

    |

  3. A potato gun first a potato horizontally down a half-open cylinder of ...

    Text Solution

    |

  4. A potato gun first a potato horizontally down a half-open cylinder of ...

    Text Solution

    |

  5. When two plane mirrors subtend an angle theta between them, then a ray...

    Text Solution

    |

  6. When two plane mirrors subtend an angle theta between them, then a ray...

    Text Solution

    |

  7. When two plane mirrors subtend an angle theta between them, then a ray...

    Text Solution

    |

  8. A man of height H is standing in front of an inclined plane mirror at...

    Text Solution

    |

  9. A man of height H is standing in front of an inclined plane mirror at...

    Text Solution

    |

  10. A man of height H is standing in front of an inclined plane mirror at...

    Text Solution

    |

  11. A turnips sits before a thin coverging lens,outside the focal point of...

    Text Solution

    |

  12. A turnips sits before a thin coverging lens,outside the focal point of...

    Text Solution

    |

  13. A turnips sits before a thin coverging lens,outside the focal point of...

    Text Solution

    |

  14. The ciliary muscles of eye control the curvature of the lens in the ey...

    Text Solution

    |

  15. The ciliary muscles of eye control the curvature of the lens in the ey...

    Text Solution

    |

  16. The ciliary muscles of eye control the curvature of the lens in the ey...

    Text Solution

    |

  17. The ciliary muscles of eye control the curvature of the lens in the ey...

    Text Solution

    |

  18. The ciliary muscles of eye control the curvature of the lens in the ey...

    Text Solution

    |

  19. Light guidance in an optical fiber can be understood by considering a ...

    Text Solution

    |

  20. Light guidance in an optical fiber can be understood by considering a ...

    Text Solution

    |