Electromagnetic Radiation & Spectroscopy {5}

Question 1

Define:

Frequency (v)?

Equation for frequency?

Answer 1

The number of cycles that light passes through a specific point

v = c / λ
c = Speed of light
λ (Lambda) = Wavelength

Question 1

Define:

Wavelength (λ)?

What does this determine? Amplitude?

Answer 1

The distance from one peak to the next
For visible light…
Wavelength determines COLOR

Amplitude: The height of each peak
Amplitude determines…Brightness

High Amplitude: Brighter
Low Amplitude: Dimmer

Question 2

Define:

Photon?

Other name? Inversely or directly proportional to wavelength?

Answer 2

A packet of light
Also known as a Quantum
E=hc/λ
E = Energy
h = Plank’s Constant

Question 3

Define:

Photoelectric effect?

Answer 3

The observation that many metals emit electrons when light shines upon them

Question 4

Define:

Heisenberg uncertainty principle?

Answer 4

Δx x mΔv >(greater than or equal to) h/4π

Δx = uncertainty in the position
Δv = uncertainty in the velocity
m = mass of the particle
h = Planck’s constant

Question 5

Define:

Emission spectrum?

Answer 5

A spectrum of bright lines on a dark background that a specific element emits when exposed to light or energy of different wavelengths

Question 6

Define:

Absorption spectrum?

Answer 6

A spectrum of dark lines on a light background that a specific element emits when exposed to light or energy of different wavelengths