Activity: Two slit interference

IB Physics: Activity: Two slit interference

When laser light is shone on two parallel slits it spreads out due to diffraction at each slit. If the slits are close to each other the light will overlap on a distant screen, light from each slit has travelled a different distance so there will be a phase difference between the two sources resulting in interfence fringes.Note: if non laser light is used then a narrow slit must be placed between the double slits and...

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