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Question
Draw the intensity pattern for double slit interference.
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Solution
Intensity pattern for double slit interference:
RELATED QUESTIONS
State differences between interference and diffraction patterns.
(i) State the essential conditions for diffraction of light.
(ii) Explain diffraction of light due to a narrow single slit and the formation of pattern of fringes on the screen.
(iii) Find the relation for width of central maximum in terms of wavelength 'λ', width of slit 'a', and separation between slit and screen 'D'.
(iv) If the width of the slit is made double the original width, how does it affect the size and intensity of the central band?
A parallel beam of light of 450 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1.5 m away. It is observed that the first minimum is at a distance of 3 mm from the centre of the screen. Calculate the width of the slit.
Which items are used to form the narrow, uniform slit?
How should the slit be oriented relative to the filament of the lit glass bulb?
What should be done while slowly adjusting the width of the slit?
What pattern appears when the bulb filament is viewed through the slit?
What happens to the bands when the slit width is narrowed?
Why is the fringe pattern wider with a red colour filter?
What is visible with white light and no filter?
