Radiation

Question 0

Give an example of electromagnetic radiation.

Answer 0

Light

Question 1

1. The transmission of energy through space without physical connection through varying electric and magnetic fields is called _______ radiation

Answer 1

Electromagnetic

Question 2

The distance between successive crests on a wave is known as its’ what?

Answer 2

Wavelength

Question 3

The number of wave crests that pass a given point per second is known as what?

Answer 3

Frequency

Question 4

What are the colors of the visible spectrum?

Answer 4

Red, orange, yellow, green, blue, violet

Question 5

Do electromagnetic waves need a medium to travel through?

Answer 5

No

Question 6

How fast do electromagnetic waves travel in space?

Answer 6

Speed of light

Question 7

Put the following in the correct order on the electromagnetic spectrum: Visible light, Gamma rays, Infrared, X rays, Radio, Ultraviolet

Answer 7

Radio, micro, infrared, visible, ultraviolet, X-rays, gamma rays

Question 8

How does the opacity of the atmosphere affect certain radiation that comes through it?

Answer 8

By absorbing and reflecting certain waves

Question 9

All thermal motion ceases to move at what degrees Kelvin?

Answer 9

0° k

Question 10

Water freezes at what degree Celsius?

Answer 10

0°c

Question 11

Convert the following to Kelvin.

0°C __ -50°C __
90°C __ -20°C __

Answer 11

Celsius + 273

Question 12

Convert the following to Celcius.
100°K __ 200°K __
273°K __ 350°K __

Answer 12

Kelvin - 273

Question 13

Define temperature.

Answer 13

The speed at which molecules move

Question 14

What happens to an objects temperature on the Blackbody spectrum as an objects radiation shifts towards higher frequency and greater intensity?

Answer 14

The temperature rises

Question 15

The thermal radiation laws state that the energy emitted is proportional to what power of the temperature?

Answer 15

4th power

Question 16

If one is moving toward a source of radiation, what happens to the wavelength? What color shift would you observe?

Answer 16

Blue shift, wavelength would become shorter

Question 17

If one is moving away from the source of radiation, what happens to the wavelength? What color shift would you observe?

Answer 17

Red shift, wavelength would become longer

Question 18

This effect is known as what?

Answer 18

Doppler

Question 19

If we are observing a star in the sky and observe that its color is blue on the visible light spectrum, what can we say about the age of the star and the amount of radiation emitted?

Answer 19

Young star, temperature is very hot