Physics unit 6
If you look directly into a mirror that is facing you 10 feet away, how far away does your virtual image appear to be standing?
10ft
The refraction of sunlight through Earth's atmosphere causes our days to appear [1] minutes longer.
5
Under which set of conditions will you likely see a rainbow?
A cloud of rain droplets is on one side of you while the rising or setting sun is on the other
Which of the following is considered iridescent a soap bubble a rainbow a compact disc a peacock feather a diamond
A compact disc peacock feathers
In 1801, Thomas Young shined monochromatic light through ________ and produced an interference pattern to demonstrate that light is a type of wave.
A pair of narrow slits
In which of these situation can we predict very little refraction?
A wave passes from one medium into a different medium where it moves with almost the same speed
Diffuse reflection will occur whenever
A wave strikes a rough surface
Through a vacuum
All colors of light travel the same speed
What is the difference between an echo and a reverberation?
An echo is one reflection, and a reverberation is many reflections
Waves with long wavelengths will ________ obstacles.
BEnd quickly around
Why is the ocean colored blue-green?
Because water absorbs red light to a greater extent than other colors
Compared to your reflection in a straight, plane mirror, your reflection in a curved mirror can appear
Bigger or smaller
What's the color yellow complementary to
Blue
Which of the following explains a way in which reflection and refraction are similar?
Both occur at the boundary between two media
Refraction will occur whenever a wave
Changes speed
A mixture of blue and green light will produce
Cyan
What's the color red complementary too
Cyan
Which of these tasks would a spectroscope be most helpful for?
Identifying the element in a substance
Diffraction ________ radio reception and ________ microscope resolution.
Improves worsens
Light from an ordinary lamp is considered incoherent or coherent
Incoherent
light from a laser is considered coherent or incoherent
Incoherent
If a waves energy is not totally reflected at a medium boundary, what happens to the remainder?
It is transmitted into the new medium
White is not a real color because
It's a combination of all colors
Black is not a real color because
It's the absence of light
When a tuning fork vibrates it emits sound . When an electron vibrates it emits
Light
A wave will reflect when it passes from one medium into another. This holds true for
Light waves and sound waves
A mixture of red and blue light will produce
Magenta
What's the color green complementary too
Magenta
Which colors are the subtractive primary colors?
Magenta cyan yellow
Can light of different colors stay in phase with one another?
No, different colors have different wavelengths and can never perfectly overlap
Which kinds of waves reflect smoothly from a wire-mesh dish? Which kinds of waves reflect diffusely from a wire-mesh dish?
Radio waves, visible light waves
Which colors are the additive primary colors?
Red green blue
Which of the following correctly orders the colors in a spectrum?
Red orange yellow green blue violet
Which of the following explains a way in which reflection and refraction are different?
Reflected waves remain in one medium, refracted waves pass into a different medium
The concept of a mirage has most to do with
Refraction
Which of the following are involved in the phenomenon of iridescence? Relation reflection defraction interference
Refraction reflection interference
Materials are more likely to be reflective if they are
Smooth and rigid to light
Reflection occurs when a wave encounters
The boundary between one medium and another medium
During the daytime, the sky is blue. At sunset, the sky becomes more red. What changes each day to produce this difference in color?
The distance of the path light takes through the atmosphere to reach your eyes
An interferometer is used to measure
The wavelength of light
Light travels through a curved optical fiber
Through a series of straight line pathways
Which of the following correctly orders colors from most scattered to least scattered in Earth's atmosphere?
Violet blue red
A mixture of red and green light will produce
Yellow
Which colors of light are human eyes most sensitive to?
Yellow green
The spectrum produced by a prism or raindrop is evidence that the average speed of light in a material depends on the light's
color
When a wave passes through an opening, some of the wave is bent. This phenomenon is called ________.
diffraction
Huygen's principle states that ________.
each point on a wave front acts as a new source of wavelets
Diffuse reflection occurs when the size of surface irregularities
large compared to the wavelength of the light used
In order for iridescence to occur, light must be shined onto
many layers of transparent or semi-transparent materials
The average speed of light is greatest in
red glass
According to the law of reflection
the angle of reflection from a mirror equals the angle of incidence
Two people stare down at a puddle on the street covered in a thin layer of gasoline and a thin layer of water. The pattern of light that reaches one person's eyes constructively interferes and destructively interferes in a way that is slightly different from the light that reaches the other's eyes. As a result ________.
the two people will see different color patterns in the puddle