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Light Test

Total questions: 41

Worksheet time: 10hrs 15mins

Name
Class
Date
1.

Which color has the longest waves?

a)

red

b)

orange

c)

yellow

d)

green

2.

The frequency of light is 7.14 x 1014 Hz. What is the wavelength?

a)

3.00 x 108 m

b)

4.20 x 10-7 m

c)

2.25 x 1023 m

d)

3.90 x 10-9 m

3.

The frequency of light is 7.14 x 1014 Hz. What is the energy?

a)

4.73 x 10-19 J

b)

1.20 x 10-48 J

c)

1.13 x 10-17 J

d)

4.97 x 10-49 J

4.

Calculate the energy of light with a frequency of 5.10 x 1014 Hz.

a)

3.38 x 10-19 J

b)

5.88 x 10-7 J

c)

9.62 x 1012 J

d)

1.04 x 10-13 J

5.

What is the frequency of ultraviolet light with a wavelength of 1.24 x 10-7 m?

a)

2.42 x 1015 Hz

b)

8.22 x 10-34 Hz

c)

3.00 x 108 Hz

d)

1.04 x 1013 Hz

6.

What is the frequency of infrared light with a wavelength of 1.05 x 10-6 m?

a)

6.96 x 10-40 Hz

b)

2.86 x 1014 Hz

c)

9.62 x 10-13 Hz

d)

2.55 x 10-19 Hz

7.

Which term describes a 3D region where the electron are most likely found?

a)

Ground state

b)

Orbital

c)

Quantum

d)

Excited State

8.

Which term describes a packet, or certain amount, of energy?

a)

Ground state

b)

Orbital

c)

Quantum

d)

Excited State

9.

In order to become excited, an electron must....

a)

absorb a constant stream of energy

b)

absorb a quantum or a several quanta of energy

c)

release a constant stream of energy

d)

release a quantum or a several quanta of energy

10.

In order to emit light, an electron must....

a)

absorb a constant stream of energy

b)

absorb a quantum or a several quanta of energy

c)

release a constant stream of energy

d)

release a quantum or a several quanta of energy

11.

Why is the Bohr Model not the currently accepted model for the atom?

a)

Because it only explains atomic emission spectra, not any other chemical properties of elements

b)

Because it conflicts with the Periodic Table

c)

Because it only explains the chemical properties of hydrogen

d)

Because it doesn't explain time travel

12.
Light is emitted when electrons ...
a)
jump from high to low 
b)
jump from low to high 
c)
either of these
d)
none of these
13.

Wavelength and Frequency are related in that...

a)

they are always the same

b)

when one increases, the other decreases (inversely proportional)

c)

there is no correlation

d)

they both vary in an irregular pattern

14.
Emission of light from an atom occurs when an electron
a)
drops from a higher to a lower energy level.
b)
   jumps from a lower to a higher energy level.   
c)
   moves within its atomic orbital.
d)
falls into the nucleus.
15.

Which of the following is the correct unit for frequency?

a)

Hz

b)

m

c)

J

d)

J⋅sJ\cdot s

16.
Which kind of wave has the greatest frequency?
a)
gamma rays
b)
infrared
c)
ultraviolet
d)
microwaves
17.

The speed of a wave is its wavelength multiplied by its ___________

Or the formula

C = λ x ν

a)

amplitude

b)

vibration

c)

frequency

d)

reflection

18.

Who decided that the position & momentum of the electron cannot be known at the same time?

a)
Planck
b)
Heisenberg
c)
de Broglie
d)
Schrodinger
19.
Heisenberg's uncertainty principle states that ___ and ___ cannot BOTH be known simultaneously?
a)

wavelength and distance

b)

position and momentum

c)

the Hulk and time travel

d)

atomic radius and frequency

20.

What is an orbital?

a)

Chewing gum

b)

The path the sun takes around the moon

c)

A 3D area outside the nucleus where electrons are found

d)

The electron cloud

21.

Photons are....

a)

a packet of electromagnetic energy

b)

an excited state

c)

the ground state

d)

frequency of time travel

22.
What is a photon?
a)
When radiation burst through electric waves
b)
The emission of electrons from a metal caused by light striking the metal
c)
The rate at which a waves energy flows through a given unit of area.
d)
packets of electromagnetic energy
23.
Certain blue lights have a frequencey of 6.91x1014Hz. What is the wavelength? (λ=c/v)
a)
4.34x1021
b)
4.34x10-21
c)
4.34x10-7
d)
2.07x1023
24.

Which of the following has the lowest frequency?

a)

The color blue

b)

The color green

c)

The color yellow

d)

The color violet

25.

Which of the following has the lowest frequency?

a)

The color blue

b)

The color green

c)

The color red

d)

The color yellow

26.
Which has the LONGEST wavelength and, therefore, the lowest frequency/energy
a)
Gamma Rays
b)
Radio Waves
c)
Visible Light
d)
Infrared rays
27.
Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy
a)
Radio waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
X-rays
28.

Shorter Wavelengths have ____Energy,Longer Wavelengths___Energy?

a)

Lower,Higher

b)

Higher,Lower

29.
The frequency of infrared waves is..
a)
1012 Hz
b)
1020 Hz
c)
104 Hz
d)
1015 Hz
30.

What is the correct order of the visible light spectrum starting with the lowest frequency?

a)

Red, yellow, orange, blue, violet, indigo

b)

Violet, indigo, blue, green, yellow, orange, red

c)

Green, yellow, blue, indigo, red, orange

d)

Red, orange, yellow, green, blue, indigo, violet

31.

Scientists observed a celestial object emitting a wavelength of 3 x 10-10m. What type of telescope did the scientists have to use to view this?

a)

Radio wave

b)

Infrared ray

c)

X-ray

d)

Gamma Ray

32.

Scientists observed a celestial object emitting waves with a frequency of 1.41 x 108 Hz. What type of telescope did the scientists have to use to view this object?

a)

Radio wave

b)

Microwave

c)

X-ray

d)

Ultraviolet wave

33.

Scientists observed a celestial object emitting a wavelength of 10−1210^{-12}  m. What type of telescope did the scientists have to use to view this?

a)

Radio wave

b)

Infrared ray

c)

X-ray

d)

Gamma Ray

34.

If an electron moves from n=4 to n=2 it ____

a)

absorbs energy

b)

emits electromagnetic radiation

35.

b is showing...

a)

excited state to ground state

b)

ground state to excited state

c)

emitting energy

d)

Planck's constant

36.

a is showing...

a)

excited state to ground state

b)

ground state to excited state

c)

absorbing energy

d)

Planck's constant

37.

e is showing...

a)

excited state to ground state

b)

absorbing energy

c)

emitting energy

d)

Planck's constant

38.

Which electrons are moving from lower energy level to a higher energy level?

a)

a

b)

b & e

c)

a & f

d)

c

39.

Which electron is moving from n=2 to n=4

a)

a

b)

b

c)

f

d)

c

40.

Which electron is emitting light?

a)

a

b)

b

c)

e

d)

None of them

41.

A radiation has a wavelength of 750 nm. What color would this be?

a)

Red

b)

Violet

c)

Green

d)

Orange

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