The pattern of diffraction of light in the single-slit experiment is different from those formed by double slits.
When we examine light waves, we learn about their many features like, how they reflect back in the process of reflection, how they change direction in the process of refraction, and how they interfere with other light waves. But, what do you believe happens when light waves collide with a gap? Will it go straight through the gap, or will it shift its direction? Let's investigate.
The double-slit experiment patterns differ from the single-slit diffraction pattern as the width and intensity reduce as we move away from the central maximum.
The path difference between two rays at an angle θ is given as ∆L= a/2 sin θ (valid only when D>> a )
The bright fringes appear at θ → sin ^-1 ( ± 3ℷ/2), sin^-1 (± 5ℷ/2)
The dark fringes appear at a sin θ = mℷ
The angular width of the central maximum is 2θ = 2λ/a
The linear width of central maxima is 2λDa.
∆L is the path difference
λ is the wavelength of the projected light
D is the distance between a slit and a screen
a is the slit width
And θ is the angle made with the undeviated direction of light.
Q. What is the condition for constructive interference?
For the constructive interference to take place, the phase difference between the two waves must be an even multiple of pie.
Q. What is the condition for destructive interference?
For the destructive interference to take place, the phase difference between the two waves must be an odd multiple of pie.
Q. What is temporal coherence?
The average correlation between the value of a wave and itself delayed by any pair of times is known as temporal coherence.
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