What happene when a light ray incidents normally on a rectAngular glass slab?
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the Ray will clearly pass through the slab but the reflected Ray will be parallel to the incident ray
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it gets refracted due to refraction of light
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A part of the ray is:
TRANSMITTED through the slab. This part of the light travels slower than it would in a vacuum, as it is now inside glass. Its wavelength would have also changed
REFLECTED at the surface, and retraces its incident path
ABSORBED by the glass, and the energy is dissipated by heating