Q: What is the value of Planck's constant ($$h) as $$given in the lecture?

$$6.63 \times 10$$^{-34}$$ \ \mathrm{J \cdot s}$$

Q: If a photon has a wavelength of $$500 \ \mathrm{nm}$$, what is its energy? (Use $$h = 6.63 \times 10$$^{-34}$$ \ \mathrm{J \cdot s}$$ and $$c = 3.00 \times 10^8$ \ \mathrm{m/s})$$

$$3.98 \times 10$$^{-19}$$ \ \mathrm{J}$$

Question 1

Which phenomenon can be explained by the wave theory of light but not by the particle theory?

Accepted Answer

2-point interference

Question 2

According to the quantum view of light, what is a photon?

Accepted Answer

A discrete package or quantum of light energy

Question 3

Which equation correctly relates the energy of a photon to its frequency?

Accepted Answer

$$E = h f$$

Question 4

What did the photoelectric effect demonstrate about the nature of light?

Accepted Answer

Light behaves as a particle in certain situations

Question 5

Which property of light determines the energy of emitted photoelectrons in the photoelectric effect?

Accepted Answer

Frequency

Question 6

What is the value of Planck's constant ($$h) as $$given in the lecture?

Accepted Answer

$$6.63 	imes 10$$^{-34}$$ \ \mathrm{J \cdot s}$$

Question 7

Which of the following is NOT explained by the wave theory of light?

Accepted Answer

Photoelectric effect

Question 8

In the quantum mechanical model of the atom, where are electrons most likely to be found?

Accepted Answer

In a probability cloud around the nucleus

Question 9

What happens when an electron in an atom jumps from a higher energy level ($$E_2) to a $$lower energy level ($$E_1$$)?

Accepted Answer

A photon is emitted with energy $$\Delta E = E_2$ - E_1$

Question 10

Which statement best describes wave-particle duality?

Accepted Answer

Light can exhibit properties of either waves or particles depending on the experiment

Question 11

Which of the following transitions in the hydrogen atom emits a photon with the highest energy?

Accepted Answer

From $$n=5 to$$ $$n=2$$

Question 12

Why do energy level diagrams not depict the actual reality of electron positions?

Accepted Answer

Because electrons exist in a probability cloud, not at fixed distances

Question 13

Which of the following best describes the ground state of an atom?

Accepted Answer

The lowest possible energy level

Question 14

If a photon has a wavelength of $$500 \ \mathrm{nm}$$, what is its energy? (Use $$h = 6.63 	imes 10$$^{-34}$$ \ \mathrm{J \cdot s}$$ and $$c = 3.00 	imes 10^8$ \ \mathrm{m/s})$$

Accepted Answer

$$3.98 	imes 10$$^{-19}$$ \ \mathrm{J}$$

Question 15

Which of the following is a correct statement about the emission spectrum of hydrogen?

Accepted Answer

It consists of discrete lines corresponding to specific energy transitions

Question 16

What is the main reason the photoelectric effect could not be explained by classical wave theory?

Accepted Answer

Wave theory predicted that energy depends on amplitude, but experiments showed it depends on frequency

Question 17

Which analogy is used to describe the indeterminate state of light before measurement?

Accepted Answer

Schrodinger's cat

Question 18

If an electron absorbs a photon and moves from $$n=1 to$$ $$n=3$$, what happens to the atom?

Accepted Answer

It moves to an excited state

Question 19

Which of the following is NOT a property explained by the particle theory of light?

Accepted Answer

2-point interference

Wave-Particle Duality, Photoelectric Effect, and Atomic Structure: Study Notes (2)

Study Guide - Practice Questions

Study Guide - Flashcards