- #1

poohead

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## Homework Statement

green light of wavelength 5000 A is incident normally on a grating, and the 2nd order image is diffracted 32 degrees from the normal. how many lines/cm are marked on the grating

A=10^-10 n= 2 degree= 32 d=? wavelength- 5000 A

the answer to the question is 5300 lines/cm

## Homework Equations

wavelength=d sin degree/ n

## The Attempt at a Solution

we tried to solve for d using the following above equation but came out with the wrong answer, need help please i am in a fatal situation here,