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(b) What is the name and the function of the pa labelled C? [2] (c) Suppose constructive interference of light witl wavelength $ \lambda $ is occurring at the centre of the detector iimum distance that mirror $ M_{1} $ can be shifted so that the interference changes to return erference in a different position? $ [1] $ bands will shift past a fixed point on the detector if the wavelength of the light is $ 660 \mathrm{~nm} $ $ M_{1} $ is moved $ 0.100 \mathrm{~mm} $ towards the compensating plate? [2] (Chapter 16): A laser beam $ (\lambda=630 \mathrm{~nm}) $ goes through a double slit with separation terference pattern is projected on a screen $ 5 \mathrm{~m} $ away, what is the distance between the thir ge and the central bright fringe? $ [4 $ (Chapter 17): A diffraction grating has 2500 lines uniformly spaced over $ 10 \mathrm{~mm} $. It pendicularly with the yellow light of a sodium lamp, which contains two wavelength $ \mathrm{Im} $ and $ 589.59 \mathrm{~nm} $ (the sodium doublet). (a) At what angles will the second order maxim velengths occur? Hence obtain their separation. (b) Suppose the interference pattern screen $ 1 \mathrm{~m} $ away: how far apart would the two peaks be? hapter 18): Monochromatic light with wavelength $ 538 \mathrm{~nm} $ is incident on a single slit w

          (b) What is the name and the function of the pa labelled C?
[2]
(c) Suppose constructive interference of light witl wavelength \( \lambda \) is occurring at the centre of the detector
iimum distance that mirror \( M_{1} \) can be shifted so that the interference changes to return erference in a different position?
\( [1] \) bands will shift past a fixed point on the detector if the wavelength of the light is \( 660 \mathrm{~nm} \) \( M_{1} \) is moved \( 0.100 \mathrm{~mm} \) towards the compensating plate?
[2]
(Chapter 16): A laser beam \( (\lambda=630 \mathrm{~nm}) \) goes through a double slit with separation terference pattern is projected on a screen \( 5 \mathrm{~m} \) away, what is the distance between the thir ge and the central bright fringe?
\( [4 \)
(Chapter 17): A diffraction grating has 2500 lines uniformly spaced over \( 10 \mathrm{~mm} \). It pendicularly with the yellow light of a sodium lamp, which contains two wavelength \( \mathrm{Im} \) and \( 589.59 \mathrm{~nm} \) (the sodium doublet). (a) At what angles will the second order maxim velengths occur? Hence obtain their separation. (b) Suppose the interference pattern screen \( 1 \mathrm{~m} \) away: how far apart would the two peaks be?
hapter 18): Monochromatic light with wavelength \( 538 \mathrm{~nm} \) is incident on a single slit w

$(b) What is the name and the function of the pa labelled C? [2] (c) Suppose constructive interference of light witl wavelength λ is occurring at the centre of the detector iimum distance that mirror M1 can be shifted so that the interference changes to return erference in a different position? [1] bands will shift past a fixed point on the detector if the wavelength of the light is 660 nm M1 is moved 0.100 mm towards the compensating plate? [2] (Chapter 16): A laser beam (λ=630 nm) goes through a double slit with separation terference pattern is projected on a screen 5 m away, what is the distance between the thir ge and the central bright fringe? [4 (Chapter 17): A diffraction grating has 2500 lines uniformly spaced over 10 mm. It pendicularly with the yellow light of a sodium lamp, which contains two wavelength Im and 589.59 nm (the sodium doublet). (a) At what angles will the second order maxim velengths occur? Hence obtain their separation. (b) Suppose the interference pattern screen 1 m away: how far apart would the two peaks be? hapter 18): Monochromatic light with wavelength 538 nm is incident on a single slit w$

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