Home
Class 12
PHYSICS
If light of intensity lo is incident at ...

If light of intensity lo is incident at an angle `45^(@)` with optical axis of polaroid, so intensity of emerging light is......

A

`I_(0)`

B

`0.5I_(0)`

C

`0.25I_(0)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
From Malus law, the intensity of emerging light is,
`I=I_(0)cos^(2) theta`
`=I_(0) cos^(2)45^(@)`
`=I_(0)xx(1)/(2)=0.5I_(0)`
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    KUMAR PRAKASHAN|Exercise SECTION-C NCERT Exemplar Solution (Long Answer Type Questions)|5 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS

    KUMAR PRAKASHAN|Exercise Section-D : Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams)|129 Videos

Similar Questions

Explore conceptually related problems

What is intensity of radiation (light)?

If unpolarised light of intensity I_(0) is incident on the polarising plate, intensity of emerging light will be ......

Two polaroids are in crossed situation and intensity of polarized light is zero. If third polaroid is placed in between such that it makes half angle with optic axis, than angle between two polaroids, then intensity of polarized light will be ....... Where I_(0) is maximum intensity of incident light.

A beam of unpolarised light of intensity is passed through a polaroid A and then through another polaroid B which is oriented so that its principal plane makes an angle of 45^(@) relative to that of A. The intensity of the emergent light

When an unpolarized light of intensity I_0 is incident on a polarizing sheet, the intensity of the light which does not get transmitted is

A narrow monochromatic beam of light of intensity I is incident on a galss plate as shown in figure. Another identical glass plate is kept close to the first one & parallel to it. Each glass plate reflects 25% of the light incident on it and transmits the remaining find the ratio of the minimum & the maximum intensities in the interference pattern formed by the two beams obtained after one reflection at each plate.

Plane polarized light incidents on tourmaline plate. vecE vectors make 45^(@) with optic axis of plate. Then % difference in magnitudes o initial and final intensities of vecE vectors is .......

How intensity of incident radiation is changed in experiment of photoelectric effect?

An unpolarised beam of light of intensity l_0 falls on a poloroid. The intensity of the emergent beam is

KUMAR PRAKASHAN-WAVE OPTICS-SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)
  1. A: To increase resolving power of a telescope, the diameter of objecti...

    Text Solution

    |

  2. What changes during the polarisation of light?

    Text Solution

    |

  3. If light of intensity lo is incident at an angle 45^(@) with optical a...

    Text Solution

    |

  4. What should be wavelength of light to get 5^(th) bright fringe at a po...

    Text Solution

    |

  5. The polarisation of light proved that light is composed of ......

    Text Solution

    |

  6. The limit of resolution of an optical instrument arises an account of ...

    Text Solution

    |

  7. Ray of light moving in water incidents on glass plate. Reflected light...

    Text Solution

    |

  8. The diameter of telescope lens is 0.61 m, the A wavelength of light is...

    Text Solution

    |

  9. In Young's experiment distance between twe slits is 0.28 mm and distan...

    Text Solution

    |

  10. Which of the following can not be polarised?

    Text Solution

    |

  11. 100pi phase difference = ...... path difference.

    Text Solution

    |

  12. What will be angle of first order maxima obtained by Fraunhoffer diffr...

    Text Solution

    |

  13. The width of fringes ...... as the Young's double slit experiment move...

    Text Solution

    |

  14. What is the angle between the plane of polarisation and the direction ...

    Text Solution

    |

  15. In Young's double slit experiment, the intensity at a point P on the s...

    Text Solution

    |

  16. In a two tourmalines experiment, the polariser and analyser are crosse...

    Text Solution

    |

  17. In a arrangement of Young experiment the central fringe of interferenc...

    Text Solution

    |

  18. Two beams of light of intensity I(1), and I(2)interfere to give an int...

    Text Solution

    |

  19. In Young's double slit experiment if the width of 4^(th) bright fringe...

    Text Solution

    |

  20. The diameter of the pupil of human eye is 2.5 mm. Assuming the wavelen...

    Text Solution

    |