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April 18, 2015

April 18, 2015

Posted by **PHYSICS** on Sunday, August 19, 2007 at 8:00pm.

I used the equation [(1/d)sin(90)]/m = wavelength: [(1/0.93m)(1)] /2 = 0.5376m. To convert to nm I multiplied by 10^-9. This is incorrect. Can anyone help? Thanks

Isn't d the reciprocal of 930/mm? or

or 1/d= .001m/930=1.08E-8 m or .108nm?

check my thinking. In your equation, unit wise, if you are to have length on the right, you have to have length units on the left.

I remember the grading equation as

d sinTheta /n= lambda, where d is in meters.

Perhaps that is your error.

- micole -
**Jonathon**, Friday, December 17, 2010 at 6:03pmThe answer should follow such that

Lines/mm --> d --> (1/930mm)/1000mm/m

d = 1.075e-6 meters

set sin theta = 90o = (1)

(dsin(Theta))m=mlambda

(1.075e-6 (1))/2)= 5.375e-7 or 537nm.

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