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How many lines per centimetre are there in a plane transmission granting which gives 1st order of light of wavelength 6000  at angle of diffraction 300?
  • a)
    8000 lines/cm
  • b)
    8333 lines/cm
  • c)
    8200 lines/cm
  • d)
    8433 lines/cm
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
How many lines per centimetre are there in a plane transmission granti...
The plane grating equation is,



∴ Grating element,

Since the getting element is equal to the reciprocal of the number of lines per cm. Therefore, number of lines per cm

Hence, the maximum number of orders visible in the spectrum are 19.
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Most Upvoted Answer
How many lines per centimetre are there in a plane transmission granti...
The plane grating equation is,



∴ Grating element,

Since the getting element is equal to the reciprocal of the number of lines per cm. Therefore, number of lines per cm

Hence, the maximum number of orders visible in the spectrum are 19.
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Community Answer
How many lines per centimetre are there in a plane transmission granti...
The plane grating equation is,



∴ Grating element,

Since the getting element is equal to the reciprocal of the number of lines per cm. Therefore, number of lines per cm

Hence, the maximum number of orders visible in the spectrum are 19.
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How many lines per centimetre are there in a plane transmission granting which gives 1st order of light of wavelength 6000at angle of diffraction 300?a)8000 lines/cmb)8333lines/cmc)8200lines/cmd)8433lines/cmCorrect answer is option 'B'. Can you explain this answer?
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