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- Sep 5, 2008
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EK says that reflection can be explained by the wave theory of light. The photons collide with the interface of a medium and reflect. Thus conserving KE and momentum. Can someone plz explain what happens with refraction? Since the speed ( assuming that it moves from air to water) decreases, the KE must decrease. What I don't understand is that if the same light were to pass through water and emerge back into air, it will have the same speed with which it entered water, since the angles are same.
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