Light travels at a speed of equation m/s in air. What is the speed of light in glass, which has an index of refraction of 1.5?

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

In physics the desire of an object to keep doing what it is doing is termed?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)