Slides etched by a needle point - now they tend to be printed onto a slide. Grating is a slide with large number of parallel, closely spaced slits A Level and AS level - UK KS 5 (Age 16 - 18).GCSE and 'O' Level - UK KS4 (Age 14 - 16).When light strikes a diffraction grating, it multiplies for the source with a parallel slit.In this case, Huygens' Principle is relevant. The wavefront will be perpendicular to the rays and parallel to the grating since the rays and wavefront constitute an orthogonal set. The rays will fall in a parallel bundle on the grating.A diffraction grating is a periodic optical element used in optics that divides light into many beams that go in various directions (i.e., different diffraction angles).When a diffraction grating is lit by a wide-spectrum (for instance, continuous light source), the colors of "rainbow" can be produced.At the first minimum adjacent to the central maximum of ….Two light sources are said to be coherent if they are obtained from ….A plane polarized light is incident on a polariser with its pass axis …?.An observer is moving with half the speed of light towards a stationary …?.Light of wavelength 550 nm falls normally on a slit of width 22.0×10−5cm…?.
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