Home
Class 12
PHYSICS
A plane glass is placed over a various ...

A plane glass is placed over a various coloured letters (violet, green, yellow, red) The letter which appears to be raised more is,

A

red

B

yellow

C

green

D

violet

Text Solution

Verified by Experts

Letters appear to be raised depending upon the refractive index of the material. Since violet has a higher refractive index than red (the increases with frequency). Red will be the lowermost.
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED SHORT ANSWER QUESTION|80 Videos
  • OPTICS

    FULL MARKS|Exercise TEXTUAL EVALUATION SOLVED LONG ANSWER QUESTION|28 Videos
  • OPTICS

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

A plane glass is place over a various coloured letters (violet , green , yellow , red) The letter which appears to be raised more is

The refractive index of a material changes by 0.014 as the colour of the light changes from red to violet. A rectangular slab of height 2.00 cm made of this material is placed on a newspaper. When viewed normally in yellow light, the letters appear 1.32 cm below the top surface of the slab. Calculate the dispersive power of the material.

Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?

A glass slab (mu = 1.5) of thickness 6 cm is placed over a paper. What is the shift in the letters?

A printed page is kept pressed to a glass cube (mu=1.5) of edge 6.0 cm. By what amount will the printed letters appear to the shifted when viewed from the top?

Read the passage and Answer the following question: In, vacuum the velocity of light radiation with different wavelength is the same. But in a material medium, the velocity of different colour radiations is not the same and they travel with different paths. Due to this, the refractive index of the medium is different for different colours. If white beam of light is incident on a glass prism, the angle of refraction for different colours is different. When Sunlight is incident on a refracting surface, then it gets split into seven coloured spectrum and emerges out. The splitting of light into its component colours is called dispersion. Sir Isaac Newton was the first to use a glass prism to obtain the spectrum of Sunlight. A glass prism is transparent medium bounded by two plane surfaces inclined at an angle. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bends the least, while violet light bends the most. So, the rays of each colour emerge along different paths and becomes distinct. Hence, we get spectrum of seven - different colours. Q. How do emergent rays appear ?

Read the passage and Answer the following question: In, vacuum the velocity of light radiation with different wavelength is the same. But in a material medium, the velocity of different colour radiations is not the same and they travel with different paths. Due to this, the refractive index of the medium is different for different colours. If white beam of light is incident on a glass prism, the angle of refraction for different colours is different. When Sunlight is incident on a refracting surface, then it gets split into seven coloured spectrum and emerges out. The splitting of light into its component colours is called dispersion. Sir Isaac Newton was the first to use a glass prism to obtain the spectrum of Sunlight. A glass prism is transparent medium bounded by two plane surfaces inclined at an angle. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bends the least, while violet light bends the most. So, the rays of each colour emerge along different paths and becomes distinct. Hence, we get spectrum of seven - different colours. Q. Which light deviates the least and which one deviates the most ?

Read the passage and Answer the following question: In, vacuum the velocity of light radiation with different wavelength is the same. But in a material medium, the velocity of different colour radiations is not the same and they travel with different paths. Due to this, the refractive index of the medium is different for different colours. If white beam of light is incident on a glass prism, the angle of refraction for different colours is different. When Sunlight is incident on a refracting surface, then it gets split into seven coloured spectrum and emerges out. The splitting of light into its component colours is called dispersion. Sir Isaac Newton was the first to use a glass prism to obtain the spectrum of Sunlight. A glass prism is transparent medium bounded by two plane surfaces inclined at an angle. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bends the least, while violet light bends the most. So, the rays of each colour emerge along different paths and becomes distinct. Hence, we get spectrum of seven - different colours. Q. Write the colours of the Spectrum ?

Read the passage and answer the following question: In, vacuum the velocity of light radiation with different wavelength is the same. But in a material medium, the velocity of different colour radiations is not the same and they travel with different paths. Due to this, the refractive index of the medium is different for different colours. If white beam of light is incident on a glass prism, the angle of refraction for different colours is different. When Sunlight is incident on a refracting surface, then it gets split into seven coloured spectrum and emerges out. The splitting of light into its component colours is called dispersion. Sir Isaac Newton was the first to use a glass prism to obtain the spectrum of Sunlight. A glass prism is transparent medium bounded by two plane surfaces inclined at an angle. When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bends the least, while violet light bends the most. So, the rays of each colour emerge along different paths and becomes distinct. Hence, we get spectrum of seven - different colours. Q. What is dispersion ?

FULL MARKS-OPTICS-TEXTUAL EVALUATION SOLVED ( MULTIPLE CHOICE QUESTIONS : )
  1. The speed of light in an isotropic medium depends on,

    Text Solution

    |

  2. A rod of length 10 cm lies along the principal axis of a concave mirro...

    Text Solution

    |

  3. An object is placed in front of a convex mirror of focal length dof f ...

    Text Solution

    |

  4. For light incident from air onto a slab of refractive index 2. Maximum...

    Text Solution

    |

  5. If the velocity and wavelength of light in air is Va and lamdaa and t...

    Text Solution

    |

  6. Stars twinkle due to

    Text Solution

    |

  7. When a biconvex lens of glass having refractive index 1.47 is dipped i...

    Text Solution

    |

  8. The radius of curvature of curved surface at a thin planoconvex lens i...

    Text Solution

    |

  9. An air bubble in glass slab of refractive index 1.5 (near normal incid...

    Text Solution

    |

  10. A ray of light travelling in a transparent medium of refractive index ...

    Text Solution

    |

  11. A plane glass is placed over a various coloured letters (violet, gree...

    Text Solution

    |

  12. Two point white dots are 1 mm apart on a black paper. They are viewed ...

    Text Solution

    |

  13. In a Young's double-slit experiment, the slit separation is doubled. T...

    Text Solution

    |

  14. Two coherent monochromatic light beams of intensities I and 41 are sup...

    Text Solution

    |

  15. When light is incident on a soap film of thickness 5xx10^(-5) cm, the ...

    Text Solution

    |

  16. First diffraction minimum due to a single slit of width 1.0xx10^(-5) c...

    Text Solution

    |

  17. A ray of light strikes a glass plate at an angle 60^@ . If the reflect...

    Text Solution

    |

  18. One of the of Young's double slits is covered with a glass plate as sh...

    Text Solution

    |

  19. Light transmitted by Nicol prism is,

    Text Solution

    |

  20. The transverse nature of light is shown in,

    Text Solution

    |