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(i) Write two points to distinguish betw...

(i) Write two points to distinguish between interference and diffraction fringes.
(ii) In a Young 's double slit experiment , fringes are obtained on a screen placed at certain distance away from the slits . If the screen is moved by 5 cm towards the slits , the fringe width changes by 30 `mu m` . Given that the slits are 1 mm apart , calculate the wavelength of the light used.

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### Step-by-Step Solution: **(i) Distinguishing Between Interference and Diffraction Fringes:** 1. **Fringe Width:** - **Interference Fringes (Young's Double Slit Experiment):** The fringe width (β) is constant for all fringes. - **Diffraction Fringes (Single Slit):** The fringe width of the central maximum is double that of the other fringes. ...
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