Question 1

The luminosity of an object is independent of its distance from you.

Accepted Answer

A) True 
 B)False

Question 2

Einstein showed that the __________ could be explained if photons carried quantized amounts of energy.

Accepted Answer

A)  warping of space and time 
B)  Heisenberg uncertainty principle 
C)  photoelectric effect 
D)  theory of special relativity 
A)  warping of space and time 
B)  Heisenberg uncertainty principle 
C)  photoelectric effect 
D)  theory of special relativity

Question 3

The Kelvin temperature scale is used in astronomy because

Accepted Answer

A)  at 0 K an object has absolutely zero energy. 
B)  water freezes at 0 K. 
C)  water boils at 100 K. 
D)  hydrogen freezes at 0 K. 
A)  at 0 K an object has absolutely zero energy. 
B)  water freezes at 0 K. 
C)  water boils at 100 K. 
D)  hydrogen freezes at 0 K.

Question 4

At what wavelength does your body radiate the most given that your temperature is approximately that of the Earth,which is 300 K?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 5

Suppose you observe a star emitting a certain emission line of helium at 584.8 nm.The rest wavelength of this line is 587.6 nm.How fast is the star moving? Is it moving toward you or away from you?

Accepted Answer

The Doppler formula states that the radi

Question 6

The   electronic energy level in a hydrogen atom is   J higher than the   level.If an electron moves from the   level to the   level then a photon of wavelength

Accepted Answer

A)  1.3 nm,which is in the ultraviolet region,is emitted. 
B)  1.3 nm,which is in the ultraviolet region,is absorbed. 
C)  1,300 nm,which is in the infrared region,is absorbed. 
D)  1,300 nm,which is in the infrared region,is emitted 
A)  1.3 nm,which is in the ultraviolet region,is emitted. 
B)  1.3 nm,which is in the ultraviolet region,is absorbed. 
C)  1,300 nm,which is in the infrared region,is absorbed. 
D)  1,300 nm,which is in the infrared region,is emitted

Question 7

How do the wavelength and frequency of red light compare to the wavelength and frequency of blue light?

Accepted Answer

A)  Red light has a longer wavelength and higher frequency than those of blue light. 
B)  Red light has a longer wavelength and lower frequency than those of blue light. 
C)  Red light has a shorter wavelength and higher frequency than those of blue light. 
D)  Red light has a shorter wavelength and lower frequency than those of blue light. 
A)  Red light has a longer wavelength and higher frequency than those of blue light. 
B)  Red light has a longer wavelength and lower frequency than those of blue light. 
C)  Red light has a shorter wavelength and higher frequency than those of blue light. 
D)  Red light has a shorter wavelength and lower frequency than those of blue light.

Question 8

In our solar system,a planet's temperature depends primarily on its albedo and distance from the Sun.

Accepted Answer

A) True 
 B)False

Question 9

If a street lamp at a distance of 100 meters from you is 10,000 times more luminous than a firefly,what is the distance the firefly has to be from you so it looks as bright as the street lamp at 100 meters?

Accepted Answer

For objects with equal brightn

Question 10

If an object is moving toward you,the light you see from it will be blueshifted.

Accepted Answer

A) True 
 B)False

The luminosity of an object is independent of its distance from you.

Einstein showed that the __________ could be explained if photons carried quantized amounts of energy.

The Kelvin temperature scale is used in astronomy because

At what wavelength does your body radiate the most given that your temperature is approximately that of the Earth,which is 300 K?

Suppose you observe a star emitting a certain emission line of helium at 584.8 nm.The rest wavelength of this line is 587.6 nm.How fast is the star moving? Is it moving toward you or away from you?

The electronic energy level in a hydrogen atom is J higher than the level.If an electron moves from the level to the level then a photon of wavelength

How do the wavelength and frequency of red light compare to the wavelength and frequency of blue light?

In our solar system,a planet's temperature depends primarily on its albedo and distance from the Sun.

If a street lamp at a distance of 100 meters from you is 10,000 times more luminous than a firefly,what is the distance the firefly has to be from you so it looks as bright as the street lamp at 100 meters?

If an object is moving toward you,the light you see from it will be blueshifted.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

A Run-Of-The-Mill G-Type Starour Sun

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

Filters

Exam 4: Light

The luminosity of an object is independent of its distance from you.

Einstein showed that the __________ could be explained if photons carried quantized amounts of energy.

The Kelvin temperature scale is used in astronomy because

At what wavelength does your body radiate the most given that your temperature is approximately that of the Earth,which is 300 K?

Suppose you observe a star emitting a certain emission line of helium at 584.8 nm.The rest wavelength of this line is 587.6 nm.How fast is the star moving? Is it moving toward you or away from you?

The electronic energy level in a hydrogen atom is J higher than the level.If an electron moves from the level to the level then a photon of wavelength

How do the wavelength and frequency of red light compare to the wavelength and frequency of blue light?

In our solar system,a planet's temperature depends primarily on its albedo and distance from the Sun.

If a street lamp at a distance of 100 meters from you is 10,000 times more luminous than a firefly,what is the distance the firefly has to be from you so it looks as bright as the street lamp at 100 meters?

If an object is moving toward you,the light you see from it will be blueshifted.

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbitsa Celestial Ballet

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquidthe Giant Planets

Gravity Is More Than Keplers Laws

Planetary Adornmentsmoons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

A Run-Of-The-Mill G-Type Starour Sun

Star Formation and the Interstellar Medium

Stars in the Slow Lanelow-Mass Stellar Evolution

Live Fast,die Younghigh-Mass Stellar Evolution

Our Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

The Origin of Structure

Life

Filters