Answer:
A medium in which speed of light is more is known as optically rarer medium and a medium in which speed of light is less is said to be optically denser medium. For example in air and water, air is raer and water is a denser medium.
Explanation:
Answer:c
impedance z=(XL^2+R^2)^1/2
power across te resistor ==i^2r
286/300
I=.976
ALRRRR