Home
Class 12
PHYSICS
When light travels from a rares to a den...

When light travels from a rares to a denser medium, the speed of light decreases. Does the reduction in speed imply a reduction in the energy ?

Text Solution

Verified by Experts

No, reduction in speed on passing from a rarer to a denser medium does not imply a reduction in energy of light because the frequency of light remains unchanged and the energy of a light photon depends only on its frequency.
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    U-LIKE SERIES|Exercise SHORT ANSWER QUESTIONS|29 Videos
  • WAVE OPTICS

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS-I|31 Videos
  • WAVE OPTICS

    U-LIKE SERIES|Exercise ASSERTION-REASON TYPE QUESTIONS|5 Videos
  • SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS

    U-LIKE SERIES|Exercise SECTION B|1 Videos

Similar Questions

Explore conceptually related problems

(a) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain why ? (bb) When light travels from a rarer to a denser medium, the speed decreases. Does the reduction in speed imply a reduction in the energy carried by the light wave? c) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity of light in the photon picture of light.

When light travels from a rarer to denser medium, it loses some speed. Does the reduction in speed imply a reduction in the energy carried by the light wave ?

Assertion: When a light wave travels from a rarer to a denser medium, it loses speed. The reduction in speed imply a reduction in energy carried by the light wave. Reason: The energy of a wave is proportional to velocity of wave.

When light travels from a rarer medium to a denser medium, it ________

When a wave travels from a denser to rarer medium, then

A: When light travels from a rarer to a denser medium, it loses some speed but it doesn't imply a reduction in the energy carried by the light wave. R: Energy carried by a wave depends on the amplitude of the wave and not on the speed of wave propagation.

Assertion (A): When a light wave travels from rarer to denser medium, its speed decreases. Due to this reduction of speed the energy carried by the light wave reduces. Reason (R): Energy of wave is proportional to the frequency.

U-LIKE SERIES-WAVE OPTICS-VERY SHORT ANSWER QUESTIONS
  1. What happens to the interference pattern if one of the slits in Young'...

    Text Solution

    |

  2. How would the angular separation of interference fringes in Young's do...

    Text Solution

    |

  3. When light travels from a rares to a denser medium, the speed of light...

    Text Solution

    |

  4. A parallel beam of monochromatic light falls normally on a single narr...

    Text Solution

    |

  5. Draw an intensity distribution graph for diffraction due to a single s...

    Text Solution

    |

  6. For a given single-slit, the diffraction pattern is obtained on a fixe...

    Text Solution

    |

  7. In a single-slit diffraction experiment, the width of the slit is redu...

    Text Solution

    |

  8. Sketch the variation of intensity of the interference pattern in Young...

    Text Solution

    |

  9. Which of the following waves can be polarised (i) Heat waves (ii) Soul...

    Text Solution

    |

  10. What is upolarised light ?

    Text Solution

    |

  11. What is plane polarised light ?

    Text Solution

    |

  12. Draw the graph showing the variation of intensity of polarised light t...

    Text Solution

    |

  13. In what way is plane polarised light different from an unpolarised lig...

    Text Solution

    |

  14. What does a polaroid consist of ?

    Text Solution

    |

  15. Unpolarised light is incident on a plane surface of glass of glass of ...

    Text Solution

    |

  16. At what angle of incidence should a light beam strike a light beam str...

    Text Solution

    |

  17. The refractive index of a medium is sqrt3. What is the angle of refrac...

    Text Solution

    |

  18. What is the speed of light in a denser medium of polarising angle 30^(...

    Text Solution

    |

  19. If the angle between the pass axis of polariser and the analyser is 45...

    Text Solution

    |

  20. How does resolving power of a telescope change in decresing the apertu...

    Text Solution

    |