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Polarods are used to control the intensi...

Polarods are used to control the intensity of light coming through windows of

A

trains and aeroplanes

B

nicol prism

C

biprism

D

ammeter

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A
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Two polaroids are kept initially with their axes parallel to each other. One of the palaroid is then rotated through various angles. How would the intensity of light coming from the rotating polaroid be affected, compared to initial intensity if it is ratated through (i) 45^@ (ii) 90^@ (iii) 180^@ .

A polarizer-analyser set is adjusted such that the intensity of light coming out of the analyser is just 12.5 % of the original intensity of light incident on the polarizer. Assuming that the polarizer-analyser set does not absorb any light, the angle by which the analyser need to be rotated in any sense to increase the output intensity to double of the previous intensity, is :

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NIKITA PUBLICATION-WAVE THEORY OF LIGHT -Multiple Choice Questions
  1. What changes on polarisation of light ?

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  2. Which of the following is used to eliminate head light glare in automo...

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  3. Polarods are used to control the intensity of light coming through w...

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  4. Which of the following is used to improve the colour contrast in old p...

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  5. Which of the following phenomenon is used to test and measure the opti...

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  6. Which of the following phenomenon is used to form characters in LCDs?

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  7. Doppler effect for light is

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  8. Doppler effect for light depends is

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  9. Due to Doppler effect, a wavelength in the middle of the visible spect...

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  10. Due to Doppler effect, a wavelength in the middle of the visible spect...

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  11. The term red shift are used for

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  12. The term blue shift is used for

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  13. Doppler effect for light is used

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  14. Change in frequency due to Doppler's effect is produced when

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  15. The Doppler effect can be observed in the following case(s) :

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  16. Select the correct statement

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  17. The velocity of light emitted by a source S observed by an observer O ...

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  18. A star emits a light of wavelength I and it is receding from the earth...

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  19. A star is moving away from the earth with a velocity of 100 km//s. If ...

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  20. Due to Doppler's effect, the shift in wavelength observed is 0.1 Å for...

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