Question

Q1) The lowest frequency available on a radio's AM dial is 570 kilohertz (kHz). What is the wavelength of this light?

Select one:

a. 1.8 X 10^-6 m

b. 5.3 X 10² m

c. 1.8 X 10^{-7 m}

d. 5.3 X 10⁴ m

e. 1.9 X 10^-3 m

Q2) Many handheld laser pointers emit 650 nm light. What is the frequency of this light?

Select one:

a. 5.1 X 10^-3 Hz

b. 2.2 X 10^-15 Hz

c. 4.6 X 10¹⁴ Hz

d. 2.0 X 10² Hz

e. 1.5 X 10⁶ Hz

Q3)

Place the following regions of the electromagnetic spectrum in order from longest to shortest wavelength.

Select one:

a. raido>microwave>visible>uv>gamma

b. visible>gamma>radio>uv>microwave

c. gamma>microwave>radio>visible>uv

d. uv>visible>microwave>radio>gamma

e. microwave>radio>uv>visible>gamma

Q4) All of the following statements are false EXCEPT

Select one:

a. the energy of a photon of light is inversely proportional to its wavelength.

b. the wavelength of light is directly proportional to the speed of light (in a vacuum).

c. the frequency of light is directly proportional to the speed of light (in a vacuum).

d. the frequency of light is inversely proportional to its energy.

e. the wavelength of light is directly proportional to its frequency.

Q5)

Some digital cordless phones operate at 2.4 GHz (1GHz = 1 X 10⁹ Hz). What is the energy, in joules, of a single 2.4 GHz photon?

Select one:

a. 0.96 J

b. 8.3 x 10^-35 J

c. 5.4 x 10^-19 J

d. 0.13 J

e. 1.6 x 10^-24 J

Q6)

The energy required to break one mole of hydrogen bonds in H2 is 436 kJ. What is the longest wavelength of light that is capable of breaking this bond?

Select one:

a. 274 nm

b. 208 nm

c. 91.7 nm

d. 192 nm

e. 103 nm

Q7)

Calculate the wavelength of the line in the Lyman series that results from the transition n = 3 to n = 1. The Rydberg constant is 2.180 x 10^-18 J.

Select one:

a. 91.12 nm

b. 72.81 nm

c. 45.59 nm

d. 136.7 nm

e. 102.5 nm

Q8)

Which of the following electronic transitions would emit the lowest energy photon?

Select one:

a. n = 5 to n = 2

b. n = 5 to n = 4

c. n = 3 to n = 2

d. n = 1 to n = 2

e. n = 2 to n = 1

Q9)

The Schrodinger wave equation

Select one:

a. proves electrons have positive and negative spins.

b. calculates the precise position and momentum of an electron at any given time.

c. can be solved to find the probability of finding an electron in a region of space.

d. proves that photons are particles.