TRUE OR FALSE?? 1.Light travels faster in liquid than in air.

2.Optical fiber light has the ability to travel long distances.

3.Light travels more slowly in water and glass materials.

4.Light always travels in a straight line when going through a single medium.

5. Laser is used by doctors in treating ailments in the internal organs such as the eyes. ​

It is really hard for me right know

Amajor difference radio waves, visible light, and gamma rays is the of the photons, which results in different photon frequencies and wavelengths

Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?