2. When light travels from one medium to another of different densities thereby causing the speed of light to be slowed down;
a. What is this phenomenon called?
b. Draw a well labelled diagram showing refraction between air and water.
c. The real depth of a coin in a swimming pool is12 m. If the refractive index of water is 4/3, calculate the apparent
depth of the swimming pool.
d. The speed of light in air is 300000000 m/s. If the refractive index of diamond is 2.4, calculate the speed of light in
diamond.
Pls answer fast

Can anybody me with this? ? (picture included.)

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.