24.1

Question 1

List the 7 types of radiation that make up the electromagnetic spectrum

Answer 1

Gamma rays, x-rays, ultraviolet, visible light, infrared light, microwaves, radio waves

Question 2

Which type of radiation has the highest wavelength?

Answer 2

Gamma rays

Question 3

Which type of radiation has the lowest wavelength?

Answer 3

Radio waves

Question 4

How does light behaves like a wave? (Wave theory of light)

Answer 4

When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of light

Question 5

How does light behave like a particle? (Photon theory of light)

Answer 5

Radiation pressure: force exerted on matter by photons

Short wavelengths = more pressure
Long wavelengths = less pressure

Question 6

Difference between astronomy and astrology?

Answer 6

Astronomy: study of everything in the universe beyond Earth’s atmosphere

Astrology: study on the sun, moon, stars, and planets

Question 7

Explain the continuous spectrum

Answer 7

Produced by incandescent (emitting light as a result from being heated) solid, liquid, or gas under high pressure

Question 8

Explain the absorption spectrum

Answer 8

Passed through relatively cool gas under low pressure

Question 9

Explain the emission spectrum

Answer 9

Produced by hot gas under low pressure

Question 10

How is the spectrum used to study stars?

Answer 10

Each element/compound produces a set of unique lines (spectral lines) which act as fingerprints

The spectral lines identify the elements present and thus the stars chemical composition

Question 11

Explain the Doppler effect

Answer 11

It refers to the apparent change in wavelength when the source is moving toward/away from you and vise versa

Toward you = blue shift (short wavelengths)
Away from you = red shift (long wavelengths)

Question 12

Which color has the shortest wavelength?

Answer 12

Purple

Question 13

Light with a ______ wavelength has more energy

Answer 13

Shorter

Question 14

Light with a ______ wavelength has less energy

Answer 14

Longer

Question 15

__________ can be used to identify elements found in stars and objects in the universe

Answer 15

Absorption spectra

Question 16

When an electron jumps up or down an o total level emits what?

Answer 16

Light (color)

Question 17

Which subatomic particle has negative charge?

Answer 17

Electron

Question 18

Which is the most abundant element in the stars?

Answer 18

Hydrogen

Question 19

Which electron move from a high energy level to a lower one, what is emitted?

Answer 19

Photons

Question 20

What’s the gadget called that decomposes light into its component wavelengths?

Answer 20

A spectroscope