Why speed of light through lens does not appear go at 3x10^8 m/s?
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Air is a rarer medium
Lens is a denser medium
When light travels from air to lens, its optical density decreases . Hence the speed of light also decreases.
Therfore the speed in lens is 2*10^8 ms-1
Lens is a denser medium
When light travels from air to lens, its optical density decreases . Hence the speed of light also decreases.
Therfore the speed in lens is 2*10^8 ms-1
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