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Answer to Question #61538 in Other Physics for na

Question #61538

16 Images formed by plane mirrors are -------------
real
diminished
enlarged
laterally inverted
17 The physical principle which accounts for the travelling of sound through longer distances at night is called-----------
waves
polariztion
diffraction
refraction
18 A ray of light travels from air to glass. The incident ray makes an angle of 45 degrees while the refracted ray makes and angle of 30 degrees with the normal to the interface. The speed of light in air is
3.0×108m/s
3.0×108m/s
. What is the of speed of light in glass?

2.12×108m/s
2.12×108m/s

4.24×108m/s
4.24×108m/s

3.73×108/s
3.73×108/s

3.00×108$/s
3.00×108$/s

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