1. Which of the following represents the greatest energy transition from a higher energy level to a lower one?

a. emission of a green photon of 550 nm

b. emission of a blue photon of 450 nm

c. emission of a yellow photon of 590 nm

d. emission of a red photon of 770 nm

 

2.Which of the following argues for the particle nature of light

a. interference

b. photoelectric effect

c. diffraction

d. doppler effect

 

3.Before a nuclear reaction, there is 0.01000 kg of uranium. After the nuclear reaction, there is 0.00950 kg of uranium. How much energy was released? (h=6.63*10^-34 J*s)

a. 5.00*10^-14 J

b.4.50*10^13 J

c. 9.00*10^16

d. 1.50 *10^5

 

4.An electron is an example of which of the following?

a. lepton

b. hadron

c. boson

d. antiparticle

 

5.How do the dark lines of an atom's absorption spectrum relate to the bright lines of its emission spectrum?

a. the dark lines are at higher energies than the bright lines.

b. You cannot relate the two types of spectra

c. The bright lines are at higher energies than the dark lines

d. The bright lines are at the same energies as the dark liens

 

6.Which of the following devices depends on the photoelectric effect?

a. speakers

b. digital camera

c. computer

d. MP3 player

 

7. Which of the following is a postulate of general relativity?

a. the speed of light is constant for all observers

b. observers will see the same laws of physics in any frame of motion whether accelerated or not.

c. observers will see the same laws of physics whether at rest or in uniform motion

d. gravitational field is the same as an object moving at the speed of light

 

8.which particles hold the nucleus together by attractive forces they exert on one another?

a. quarks

b. protons

c. neutrons

d. positrons

 

9.What is the prominent nuclear process within stars?

a. alpha emission

b. fission

c. beta emission

d. fusion

 

10. A gas cloud surrounds a dying star against a dark background. The star heats the gases in the cloud. What type of spectrum would you expect to find from the gas cloud?

a. high frequency spectrum

b. emission spectrum

c. absorption spectrum

d. continuous spectrum

 

11. Which of the following could Einstein's theory on the photoelectric effect explain that the wave theory could not explain?

a. the kinetic energy of photoelectrons was not related to the intensity of light

b. if the light intensity was increased, then the number of electrons ejected increased.

c. if the light intensity was decreased, then the number of ejected electrons decreased.

d. electrons were ejected by incoming light.

 

12.Which of the following is explained by general relativity

a. why no object can move faster than light through space time

b. why atomic clocks tick more slowly when in motion

c. how massive stellar objects can form a lens

d. why moving muons decay more slowly than stationary ones

 

13.What will experiments with ever larger particle accelerators tell us?

a. what happens when matter and antimatter collide

b. what conditions were like in the early universe closer to the big bang

c. what conditions were like in the early universe before the big bang

d. what the father of the universe will be

 

14. A paleontologist measures the ratio of carbon 14 to carbon 12 in a fossil skull found at a site. What technique is he using and for what purpose?

a. using gamma emissions to date the skull

b. using alpha emission to determine the structure of the skul

c. using radioactive decay to date the skull

d. using radioactive decay to determine the structure of the skull

 

15. What accounts for the emission spectra of elements?

a. electrons spinning around the nucleus within orbits

b. electrons moving from low energy levels to high energy levels

c. electrons moving in opposite directions around the nucleus

d. electrons moving from high energy levels to low energy levels

 

16. What is the energy of a single photon of red light with a wavelength of 700 nm? Remember that E=hf and Planck's constant is expressed by h=6.63*10^-34 j*s=4.14*10^-15 dV*s

a. 2.84*10^-19 J

b. 2.84*10^14 J

c. 4.98*10^-19 J

d. 4.29*10^14 J

 

17. What branch of physics best explains the photoelectric effect?

a. thermodynamics

b. nature of light

c. general relativity

d. law of conservation of momentum

 

18. Why is the composition of a neutron?

a. three down quarks

b. two up quarks and one down quark

c. one up quark and two down quarks

d. three up quarks

 

19. How does gamma emission affect the atomic number of an isotope?

a. it decreases the atomic number

b. it does not change the atomic number

c. you cannot tell from the information given

d. it increases the atomic number

 

20. which of the following processes is used by NASA to make electric power on deep space probes?

a. fusion

b. fission

c. X ray bombardment

d. radioactive decay

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