Home
Class 12
PHYSICS
When a ray of light enters a glass slab ...

When a ray of light enters a glass slab from air

A

its wavelenght decreases

B

its wavelenght increases

C

its frequency increases

D

neither is wavelenght nor its frequency changes

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
Wavelenght , `lambda = ("Velocity")/("Frequency") = (u)/(v)`
When light travels from air to glass, frequency v remains unchanged, velocity u decreases and hence wavelenght `lambda` also decreases.
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    FULL MARKS|Exercise ADDITIONAL QUESITON - II ADDITIONAL PROBLEMS:|11 Videos

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED V.NUMERICAL PROBLEMS|10 Videos

  • MAGNETISM AND MAGNETIC EFFECTS OF ELECTRIC CURRENT

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - NUMERICAL PROBLEMS :|4 Videos

  • RECENT DEVELOPMENTS IN PHYSICS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS (Short Answer Question)|6 Videos

Similar Questions

Explore conceptually related problems

When a ray of light entes glass from water, it bends ____________.

When a ray of light travels from air to glass and strikes the surface of separation at 90^(@) , then it ……………… .

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?

A ray of light passes through a glass slab of thickness t and refractive index mu . If the speed of light in air be 'c', the time taken by the ray to cross through the plate is _______

When a ray of light enters from one medium to another, then which of the following does not change?

When a ray of light travels from one transparent medium into another obliquely, the path of the light undergoes ____________.

A ray of light strikes the glass slab at an angle of 50^(@) . What is the angle of incidence ?

When a ray of light enter from one medium to another, its velocity is doubled. The critical angle for the ray for two internal reflection will be

FULL MARKS-OPTICS-ADDITIONAL QUESITON -( MULTIPLE CHOICE QUESTIONS )
  1. When a ray of light enters a glass slab from air

    Text Solution

    |

  2. A source emits sound of frequency 600 Hz inside water. The frequency h...

    Text Solution

    |

  3. Two beams of red and violet colours are made to pass separately throu...

    Text Solution

    |

  4. To get three images of a single obiect, one should have two plane mirr...

    Text Solution

    |

  5. Which of the following is used in optical fibres?

    Text Solution

    |

  6. Two lenses of power - 15 D and + 5 D are in contact with each other. T...

    Text Solution

    |

  7. The refractive index of glass is 1.520 for red light and 1.525 for blu...

    Text Solution

    |

  8. Time image formed by an objective of a compound microscope is

    Text Solution

    |

  9. An astronomical telescope has a large aperture to,

    Text Solution

    |

  10. Two plane mirros are inclined to each other at an angle of 60^(@). A p...

    Text Solution

    |

  11. A boy 1.5 m tall with his eye level at 1.38 m stands before a mirror f...

    Text Solution

    |

  12. A pencil of light rays falls on a plane mirror and forms a real image,...

    Text Solution

    |

  13. For a real object, which of the following can produce a real image?

    Text Solution

    |

  14. Which mirror is to be used to obtain a paralle beam of light from a s...

    Text Solution

    |

  15. When a plane electromagnetic wave enters a glass slab, then which of t...

    Text Solution

    |

  16. If wavelenght of light in air is 2400 xx 10(-10) m, then what will be...

    Text Solution

    |

  17. Why is refractive index in a transparent medium greater that one?

    Text Solution

    |

  18. The wavelenght of sodium light in air is 5890Å. The velocity of light...

    Text Solution

    |

  19. A glass slab (mu = 1.5) of thickness 6 cm is placed over a paper. What...

    Text Solution

    |

  20. Light traveling from a transparent medium to air undergoes that intern...

    Text Solution

    |