ASTRONOMY 1345, JAAFARI, TEST 2, UTA, 2025/2026
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+
When light passes through a prism of glass Ans✓✓✓refraction changes
the directions of different colors or wavelengths of light.
Thomas Young's experiment on the nature of light
Ans✓✓✓demonstrated the wave nature of light by passing light through
two slits and obtaining a pattern of bright and dark bands on a screen
that he correctly interpreted as interference between the two light beams.
What did James Clerk Maxwell's investigations of the nature of light
prove? Ans✓✓✓light could be described by oscillating electric and
magnetic fields
Electromagnetic radiation moving through space with the speed of light
consists of Ans✓✓✓oscillating
electric and magnetic fields, always inseparable, always having the same
frequency and wavelength and traveling in the same direction.
Range of wavelengths of the visible wavelengths of electromagnetic
radiation Ans✓✓✓400 nm to 700 nm.
Violet light differs from red light in that it Ans✓✓✓has a shorter
wavelength than red light.
,What is the relationship between color and wavelength for light?
Ans✓✓✓Wavelength increases from violet to red.
All forms of light have what property in common? Ans✓✓✓All forms
of light are electromagnetic radiation.
What is the one fundamental difference between X rays and radio
waves? Ans✓✓✓The wavelengths of X rays and radio waves are very
different.
Visible light occupies what position in the electromagnetic spectrum?
Ans✓✓✓between infrared and ultraviolet
In terms of wavelengths, gamma rays Ans✓✓✓have the shortest
wavelengths of the named electromagnetic waves.
What is refraction of light? Ans✓✓✓change in direction of a light ray as
it passes at an angle from one transparent material to another that has a
different optical density
The speed of light always has the same value in a vacuum Ans✓✓✓but
is slower in transparent materials such as water and glass.
The speed of light always has the same value in a vacuum Ans✓✓✓but
is slower in transparent materials such as water and glass.
, The wavelength of green light is about 500 nanometers. What is this
length in meters? Ans✓✓✓500 billionths of a meter (1 billion = 1000
million)
All forms of light have what property in common? Ans✓✓✓All forms
of light are electromagnetic radiation.
The speed of light in space is Ans✓✓✓3 × 10^8 meters per second,
independent of the speed of the sourc
If two photons in a vacuum have different energies, what can we say
about the wavelengths of the photons? Ans✓✓✓The higher-energy
photon has the shorter wavelength.
In the photoelectric effect, a beam of light impinges on a metal, and it is
observed that electrons are ejected from the metal in greater numbers as
the Ans✓✓✓intensity of the light is increased.
Our present understanding of the nature of light is that it
Ans✓✓✓displays behavior of both waves and particles.
In terms of wavelengths, gamma rays Ans✓✓✓have the shortest
wavelengths of the named electromagnetic waves.
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALREADY GRADED A+
When light passes through a prism of glass Ans✓✓✓refraction changes
the directions of different colors or wavelengths of light.
Thomas Young's experiment on the nature of light
Ans✓✓✓demonstrated the wave nature of light by passing light through
two slits and obtaining a pattern of bright and dark bands on a screen
that he correctly interpreted as interference between the two light beams.
What did James Clerk Maxwell's investigations of the nature of light
prove? Ans✓✓✓light could be described by oscillating electric and
magnetic fields
Electromagnetic radiation moving through space with the speed of light
consists of Ans✓✓✓oscillating
electric and magnetic fields, always inseparable, always having the same
frequency and wavelength and traveling in the same direction.
Range of wavelengths of the visible wavelengths of electromagnetic
radiation Ans✓✓✓400 nm to 700 nm.
Violet light differs from red light in that it Ans✓✓✓has a shorter
wavelength than red light.
,What is the relationship between color and wavelength for light?
Ans✓✓✓Wavelength increases from violet to red.
All forms of light have what property in common? Ans✓✓✓All forms
of light are electromagnetic radiation.
What is the one fundamental difference between X rays and radio
waves? Ans✓✓✓The wavelengths of X rays and radio waves are very
different.
Visible light occupies what position in the electromagnetic spectrum?
Ans✓✓✓between infrared and ultraviolet
In terms of wavelengths, gamma rays Ans✓✓✓have the shortest
wavelengths of the named electromagnetic waves.
What is refraction of light? Ans✓✓✓change in direction of a light ray as
it passes at an angle from one transparent material to another that has a
different optical density
The speed of light always has the same value in a vacuum Ans✓✓✓but
is slower in transparent materials such as water and glass.
The speed of light always has the same value in a vacuum Ans✓✓✓but
is slower in transparent materials such as water and glass.
, The wavelength of green light is about 500 nanometers. What is this
length in meters? Ans✓✓✓500 billionths of a meter (1 billion = 1000
million)
All forms of light have what property in common? Ans✓✓✓All forms
of light are electromagnetic radiation.
The speed of light in space is Ans✓✓✓3 × 10^8 meters per second,
independent of the speed of the sourc
If two photons in a vacuum have different energies, what can we say
about the wavelengths of the photons? Ans✓✓✓The higher-energy
photon has the shorter wavelength.
In the photoelectric effect, a beam of light impinges on a metal, and it is
observed that electrons are ejected from the metal in greater numbers as
the Ans✓✓✓intensity of the light is increased.
Our present understanding of the nature of light is that it
Ans✓✓✓displays behavior of both waves and particles.
In terms of wavelengths, gamma rays Ans✓✓✓have the shortest
wavelengths of the named electromagnetic waves.
