Question

What is the wavelength in nm of a light whose first order bright band forms a

Answer 1

Answer:

714 nm

Explanation:

Using the equation: nλ=dsinθ

where

n= order of maximum

λ= wavelength

d= distance between lines on diffraction grating

θ= angle

n is 1 because the problem states the light forms 1st order bright band

λ is unknown

d=  $\frac{1}{700,000}$ or 0.0000014 (meters)

sin(30)= 0.5

so

(1)λ=(0.0000014)(0.5)

=0.000000714m or 714 nm