Home
Class 12
PHYSICS
When the diffraction pattern from a cert...

When the diffraction pattern from a certain slit illuminated with laser light (`lambda = 6330 A^@)` is projected on a screen 150 cm from the slit, the second minima on each side are separated by 8 cm. This tells us that:

A

the slit is approximately 0.005 cm wide

B

the slit is approximately 0.05 cm wide

C

`a//lambda` is approximately 7.5 (a is the slit width)

D

`a//lambda` is approximately 750

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 5

    KVPY PREVIOUS YEAR|Exercise EXERCISE|19 Videos

  • MOCK TEST 7

    KVPY PREVIOUS YEAR|Exercise EXERCISE|21 Videos

Similar Questions

Explore conceptually related problems

Why can we not get diffraction pattern from a wide slit illuminated by monochromatic light ?

In a Young’s double slit experiment for interference of light, the slits are 0.2 cm apart and are illuminated by yellow light (lambda = 600 nm) . What would be the fringe width on a screen placed 1 m from the plane of slits if the whole system is immersed in water of index 4/3 ?

Two slits are separated by distance of 0.5 and illuminate with light of lambda=6000Å . If the screen is placed 2.5m from the slits. The distance of the third bright image from the centre will be

Two slits are separated by a distance of 0.5mm and illuminated with light of lambda=6000Å . If the screen is placed 2.5m from the slits. The distance of the third bright image from the centre will be

In aYoung's double slit experiment for interference of light.the slits are 0.2 cm apart and are illuminated by yellow light (lambda=600nm) .What would be the fringe width on a screen placed 1m from the plane of slits if the whole systems is immersed in water of index 4//3 ?

A single slit of width 0.1mm is illuminated by parallel light of wavelength 6000Å, and diffraction bands are observed on a screen 40cm from the slit. The distance of third dark band from the central bright band is:

(a) Derive the relation a sin theta=lambda for the first minimum of the diffraction pattern produced due to a single slit of width ‘a’ using light of wavelength lambda . (b) State with reason, how the linear width of central maximum will be affected if (i) monochromatic yellow light is replaced with red light, and (ii) distance between the slit and the screen is increased. (c) Using the monochromatic light of same wavelength in the experimental set-up of the diffraction pattern as well as in the interference pattern where the slit separation is 1 mm, 10 interference fringes are found to be within the central maximum of the diffraction pattern. Determine the width of the single slit, if the screen is kept at the same distance from the slit in the two cases.

A screen is placed 50 cm from a single slit, which is illuminated with 6000 Å light. If the distance between the first and third minima in the diffraction pattern is 3.00 mm , what is the width of the slit ?

KVPY PREVIOUS YEAR-MOCK TEST 6-EXERCISE
  1. A ray of light moving in air strikes at origin at grazing angle and th...

    Text Solution

    |

  2. The eccentricity of the earth's orbit is 0.0167, the ratio of its maxi...

    Text Solution

    |

  3. Two vessels A and B of different shapes have the same base area and ar...

    Text Solution

    |

  4. When the diffraction pattern from a certain slit illuminated with lase...

    Text Solution

    |

  5. What is the moment of inertia of a ring about a tangent to the periphe...

    Text Solution

    |

  6. A particle moves with a velocity (3i+ 4j) m/s from origin.The displace...

    Text Solution

    |

  7. Hydrogen (H), deuterium (D), singly ionized helium (He^(+)) and doubly...

    Text Solution

    |

  8. The moment of inertia of a uniform thin rod of length L and mass M abo...

    Text Solution

    |

  9. A charge q is uniformly distributed on a non-conducting disc of radius...

    Text Solution

    |

  10. Refer to the common emitter amplifier circuit shown below, using a tra...

    Text Solution

    |

  11. If the length of a tube is less and cannot accommodate the maximum ris...

    Text Solution

    |

  12. A square wire loop with 2 m sides in perpendicular to a uniform magnet...

    Text Solution

    |

  13. A car accelerates from rest at a constant rate alpha for some time, af...

    Text Solution

    |

  14. Suppose Earth’s orbital motion around the Sun is suddenly stopped. Wha...

    Text Solution

    |

  15. Four balls each of radius 10 cm and mass 1 kg,2 kg,3 kg and 4kg are at...

    Text Solution

    |

  16. A particle of mass m moving with kinetic energy K, makes a head - on e...

    Text Solution

    |

  17. One mole of an ideal monatomic gas has initial temperature T0, is made...

    Text Solution

    |

  18. Let V and I be the readings of the voltmeter and the ammeter respectiv...

    Text Solution

    |

  19. A freshely prepared radioactive source of half 2 hours emits radiation...

    Text Solution

    |

  20. A large cylindrical rod of length L is made by joining two identical r...

    Text Solution

    |