Home
Class 12
PHYSICS
Estimate the distance for which ray opti...

Estimate the distance for which ray optics is good approximation foran aperture of 4mm and wavelength 400 nm.

Text Solution

Verified by Experts

Expressionfor Fresnel distance is `z_(F)=(a^(2))/(lamda)=((4xx10^(-3))^(2))/(400xx10^(-9))=40m`
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise PRACTICE PROBLEMS FOR SELF ASSESSMENT|14 Videos

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise EVALUATION QUESTIONS AND ANSWERS|18 Videos

  • WAVE OPTICS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|17 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

Similar Questions

Explore conceptually related problems

Calculate the distance for which ray optics is good aproximation for an aperture of 5 mm and wavelenght 500 nm.

For what distance is ray optics a good approximation when the aperture is 3mm wide and the wavelength is 500 nm?

In Young's double slit experiment, the separatation of the slit is 2mm. The screen is at a distance 1m from the slit. How many bands can be seen in a space of 1cm? Given wavelength of light =400nm.

In Young's double slit experiment, the distance of the screen from the two slits in 1m. When a light of wavelength 600nm is allowed to fall on the slits width of the fringes obtained on the screen is 2mm. Calculate the width of the fringe if the wavelength of the incident light is 400nm. Calculate band width in each case if the arrangement is immersed in water of refractive index 1.33.

An aperture of size a is illuninated by a parallel beam of light of wavelength gamma . The distance at which ray optics has a good approximation is

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm approximately. The maximum distance at which these dots can be resolved by the eye is, (take wavelength of light, lamda = 500 nm)

In Young's double slit experiment, the slits are 2 mm apart and are illuminated with a mixture of two wavelength lamda_0 = 750 nm and lamda = 900 nm. What is the minimum distance from the common central bright fringe on a screen 2 m from the slits where a bright fringe from one interference pattern coincides with a bright fringe from the other?

NEW JOYTHI PUBLICATION-WAVE OPTICS-SOLUTION TO EXERCISES FROM NCERT TEXT
  1. What is the shape of the wavefront in each of the following cases? a...

    Text Solution

    |

  2. a. The refractive index is glass is 1.5. What is the speed of light in...

    Text Solution

    |

  3. In a Young's double slit experiment, the slits are separated by 0.28 m...

    Text Solution

    |

  4. In Young's double slit experiment using monochromatic light of wavelen...

    Text Solution

    |

  5. A beam of light consisting of two wavelengths, 650 nm and 520 nm, is ...

    Text Solution

    |

  6. Ina double slit experiment the angular width of a fringe is found to b...

    Text Solution

    |

  7. What is the Breswster angle for air to glass transition? (Refractive i...

    Text Solution

    |

  8. Light of wavelength 5000Å falls on a plane reflecting surface. What ar...

    Text Solution

    |

  9. Estimate the distance for which ray optics is good approximation foran...

    Text Solution

    |

  10. The 6563ÅHalpha line emitted by hydrogen in a star is found to be red ...

    Text Solution

    |

  11. Explain how Corpuscular theory predicts the speed of light in a medium...

    Text Solution

    |

  12. You have learnt in the text how Huygens' principle leads to the laws o...

    Text Solution

    |

  13. Let us list some of the factors, which could possibly infuence the spe...

    Text Solution

    |

  14. For sound waves, the Doppler formula for frequency shift differs sligh...

    Text Solution

    |

  15. In double slit experiment using light of wavelength 600 nm, the angula...

    Text Solution

    |

  16. Answer the following questions: a. In a single slit diffraction expe...

    Text Solution

    |

  17. Two towers on top of two hills are 40 km apart. The line joining them ...

    Text Solution

    |

  18. A parallel beam of light of wavelength 500 nm falls on a narrow slit a...

    Text Solution

    |

  19. Suggest a possible explanation. As you have learnt in the text, the p...

    Text Solution

    |

  20. In deriving the single slit diffraction pattern, it was stated that th...

    Text Solution

    |