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Easy question on diffraction of light please help!

  • Thread starter Sabrina_18
  • Start date
  • #1
[SOLVED] Easy question on diffraction of light please help!

Homework Statement


Wavelengths are; 1 - 520nm
Wavelength 2 - 520.8nm
Diffraction grating - 400 lines per mm
How many orders will the lines be seen in?


Homework Equations


N = dsin0/lamda


The Attempt at a Solution



d = 1/4 X 10^5 = 25 X10^-7m
25 X 10^-7 / 520 X 10^-9 = 4.8
So is the answer 4??? for the first wavelength (520nm)

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
G01
Homework Helper
Gold Member
2,665
16
Your work looks good to me.
 
  • #3
49
0
I got 4.80769, so your math is correct.
 
  • #4
Thanks - hope its right!
 

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