The index of refraction of the first medium must be greater than the index of refraction of the second medium for total internal reflection to occur.

Please select the best answer from the choices provided

T
F

please comment with true or false

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical