Midterms | Unit 3: Electromagnetic Wave

Question 1

(1) consist of both electric and magnetic field waves. These waves oscillate in (2) with respect to each other and are in (3).

Answer 1

1. Electromagnetic waves
2. perpendicular planes
3. phase

Question 2

The creation of all electromagnetic waves begins with an oscillating (1), which creates oscillating (2).

Answer 2

1. charged particle
2. electric and magnetic fields

Question 3

Once in (1), the electric and magnetic fields that a charged particle creates are(2): time-dependent changes in one field (electric or magnetic) produce the other.

Answer 3

1. motion
2. self-perpetuating

Question 4

The type of energy in x-rays, radio waves, microwaves & visible light

Answer 4

Electromagnetic Energy

Question 5

The smallest quantity of any kind of electromagnetic energy

Answer 5

Photon

Question 6

Photon may be pictured as a —

Answer 6

quantum

Question 7

Waveform of a photon

Answer 7

o Waveform: sinusoidal fashion

Question 8

A small bundle of energy

Answer 8

Quantum

Question 9

Properties of Electromagnetic Energy

Answer 9

o Frequency
o Wavelength
o Velocity
o Amplitude

Question 10

He showed that visible light has both electric & magnetic properties

Answer 10

James Clerk Maxwell (Late 19th Century)

Question 11

Three Wave Parameters

Answer 11

Velocity, Frequency & Wavelength

Question 12

These are used for both sound & electromagnetic energy

Answer 12

Electromagnetic Wave Equation

Question 13

He synthesized our understanding of electromagnetic radiation

Answer 13

Max Planck

Question 14

When did Planck receive the Nobel Prize?

Answer 14

1918

Question 15

Planck’s Quantum Theory

X-rays are created with the (1)
X-rays exist with (1), or they do not exist at all

Answer 15

1. speed of light (c)
2. velocity

Question 16

Planck’s Quantum Equation

Answer 16

E = hf

Question 17

PLANCK’S CONSTANT

Answer 17

h=4.15 x 10-15 Ev-s

Question 18

Wave-Particle Duality

Answer 18

✓ Visible Light Photons
✓ X-ray Photons
✓ Wave Particle duality

Question 19

They behave more like waves

Answer 19

Visible Light Photons

Question 20

They act more like particles

Answer 20

X-ray Photons

Question 21

The principle that states that both wave & particle concepts must be retained, because wave-like properties are exhibited in some experiments & particle-like properties are manifested in others

Answer 21

Wave Particle duality

Question 22

Photons interact with matter most easily when the (1) is approximately the same size as the (2)

Answer 22

1. matter
2. photon wavelength

Question 23

The reduction in intensity that results from scattering & absorption

Answer 23

Electromagnetic Energy Attenuation

Question 24

Interaction Between Light & Absorbing Material

Answer 24

✓ Transparency: not at all (transmission)
o e.g., window glass

✓ Translucency: partially (attenuation)
o e.g., frosted glass

✓ Opacity: completely (absorption)
o e.g., black glass

Question 25

The structures that absorb x-rays

Answer 25

Radiopaque

Question 26

Example of radiopaque

Answer 26

Bones

Question 27

The structures that transmit x-rays

Answer 27

Radiolucent

Question 28

Example Radiolucent

Answer 28

Lung tissue