Total Internal Reflection: A glass plate having an index of refraction is 1.66 is immersed in a certain alcohol. The surface of the glass is inclined at an angle of 44° with the vertical. When a horizontal ray in the glass strikes the interface, you observe that it is at the critical angle. What is the index of refraction of the alcohol?

A. 1.15
B. 1.13
C. 1.11
D. 1.09
E. 1.17


Answer: A

Physics & Space Science

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Fill in the blank(s) with correct word

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The positron was discovered by which of the following physicist

a. Paul A. M. Dirac who discovered it in Great Britain. b. Hideki Yukawa who discovered it in Japan. c. The Austrian physicist V. F. Hess who discovered it in balloon flights. d. Richard Feynman who discovered it after proposing his diagrams. e. Carl Anderson who discovered it while at Caltech.

Physics & Space Science

Earth possesses few visible craters and the moon possesses many. This is because

a. Earth formed later than the moon and, therefore hasn't encountered as many meteoroids. b. the moon doesn't have an atmosphere that could burn up many of the meteorites before impacting. c. erosion and plate tectonics have slowly removed evidence of past cratering on Earth. d. all of the above e. only b and c

Physics & Space Science

The quantum mechanical model of the hydrogen atom requires that if the principal quantum number is 5, there will be how many different permitted orbital quantum number(s)?

a. two c. one b. five d. four

Physics & Space Science