The diffraction grating equation is given by:
d sin θ = nλ
State the definition of the following variables and an appropriate unit for each.
(i) d
(ii) θ
(iii) n
(iv) λ
A diffraction grating has 720 × 103 lines per m.
Calculate the distance between adjacent slits of the grating.
A narrow laser beam of wavelength 635 nm is directed normally onto the diffraction grating from part (b), as shown in Figure 1.
Figure 1
The first order diffracted beam makes an angle θ with the centre.
Calculate the value of θ.
With this laser beam, the highest order observed on the screen is the second.
State how many minima are seen on the screen.
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