Young’s Double Slit Experiment
Couple
• A couple acts on a rigid body, that is, a body in which none of the internal parts move relative to one another. • Note 1: We can consider torques about any point between the forces. • Note 2: Although there is no resultant force, there will be acceleration Young’s Double Slit Experiment The initial experiment setup consisted of a candle, as light source, and two sets of pinholes, which produced coherent light waves.
• Light from the same wave front is incident on both slits. The slits become coherent point sources. • Interference occurs on a distant screen, as alternating bright and dark bands, called fringes. • The central fringe (q = 0) appears as a result of constructive interference for all wavelengths, therefore it will be white if white light is used.
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A couple is a special case of a torque with two equal but oppositely directed parallel forces acting at different points of a body.
