Radiation to Investigate stars Unit 1.6

Question 1

A stars spectrum consists of 2 spectrums?

Answer 1

1. Continuous spectrum
2. Line absorption Spectrum

Question 2

Define Black Body

Answer 2

Ideal surface that absorbs all the e-m radiation falling on it.

Question 3

When the Black body is at its peak what is true?

Answer 3

wavelength is inversely proportional to temprature

Question 4

weins law?

Answer 4

wavelengthMAX = W/T

Question 5

Constant W is?

Answer 5

2.90x10^-3

Question 6

Stefan’s law?

Answer 6

Power = @AT^4

Question 7

@?

Answer 7

5.67x10^-8

Question 8

What to do to convert Kelvin to Celsius

Answer 8

+273.15

Question 9

Define stars luminosity?

Answer 9

Stars total power of e-m radiation it emits (W)

Question 10

Define Intensity?

Answer 10

energy passing per unit time, per unit area through a area normal to propagation direction.

Question 11

Define Inverse Square Law?

Answer 11

Intensity = Luminosity/4(pi)R^2

Question 12

using inverse square law doubling the distance…

Answer 12

quarters the intensity.

Question 13

What does the inverse square law assume?

Answer 13

No absorption of radiation as it travels.

Question 14

Define multiwavelength astronomy?

Answer 14

detection and analysis of e-m radiation from stars and other objects in space with wavelengths ranging from radio waves to gamma rays.