Waves and such

Question 1

What is a transverse wave?

Answer 1

A wave that oscillates perpendicular to its direction of travel

Question 2

What is an electromagnetic wave?

Answer 2

A type of Transverse wave that accounts for radiation throughout the universe, where the electric field is what is being oscillated.

Question 3

What is frequency?

Answer 3

the # or “frequency” of waves in a set amount of time

Question 4

What are crests and troughs?

Answer 4

Rises and dips in waves

Question 5

What is wavelength?

Answer 5

The distance from one point on a wave to the same equivalent point - E.G total length of a wave

Question 6

What is amplitude?

Answer 6

distance as measured from the resting state to a crest or trough

Question 7

How do frequency and wavelength correlate?

Answer 7

High frequency = short wavelength
Low frequency = long/large wavelength

Question 8

How do wavelength and frequency present on the electromagnetic spectrum

Answer 8

Frequency increases towards the left, wavelength subsequently increases towards the right.

Question 9

What is the order of the electromagnetic spectrum (Left to right)

Answer 9

X-Rays
Ultraviolet
Visible light
Infrared
Microwaves
Radio waves

Question 10

What does ROY G BIV stand for?

Answer 10

Warm:
Red, Orange, Yellow,
Neutral:
Green
Cool:
Blue, Indigo, Violet

Represents the visible light section of the electromagnetic spectrum

Question 11

Which sections cover the largest and smallest portions of the electromagnetic spectrum

Answer 11

Largest: Infrared
Smallest: Visible light

Question 12

How is energy measured on the electromagnetic spectrum?

Answer 12

decreasing from left to right (corresponds with frequency)

Question 13

What happens when light from a hot dense object is put through a prism?

Answer 13

The light is separated into the visible light spectrum (blended)

Question 14

What happens when the light from a hot, dilute gas is put through a prism?

Answer 14

The light is separated into an emission spectrum (Sharp distinct lines)
EXAMPLE: Orion emission nebula

Question 15

What is the order of hotness for star colors?

Answer 15

Blue (hottest)
White
Yellow
Red

Question 16

What are kirchhoff’s spectroscopy laws?

Answer 16

Hot source —–> continuous spectrum
Hot source—> gas —–> a) emission spectrum (black lines)
b) absorption spectrum (bright lines)

Question 17

What is the classic example of Kirchhoff’s spectroscopy laws?

Answer 17

Helium emission spectrum in the atmosphere of the sun

Question 18

What is a black body spectrum?

Answer 18

The spectrum of light emitted from any heated object

Question 19

Bohr theory

Answer 19

The idea that electrons orbit a nuclues with a specific quantified energy level (Basically only certain wavelengths are possible because of symmetry)

Question 19

Explain Absorption levels (of a hydrogen atom)

Answer 19

a photon coming in must have the particular wavelength to be absorbed from one level to the next (spectral orbits)

From the nucleus out:
1
Big jump! ultraviolet
2
Red balmer line
3
n=4

Will eventually decay back down the ladder emitting the same (ultraviolet) photon