![subject](/tpl/images/cats/biologiya.png)
Biology, 30.03.2021 19:30 tashanicole
Please help if i fail this test im gonna fail:((
1.Black is the absence of all light. So why do the fur and pupils of this cat appear to us to be black?
A
The fur and pupils of the cat only reflect the black wavelength of light back to our eyes.
B
There is no light in the room where the cat is located.
C
The fur and pupils of the cat absorb all of the light waves so our eyes detect black.
D
The fur and pupils of the cat reflect all light waves back to our eyes.
2.The diagram shows the electromagnetic spectrum. Based on the diagram, which statement is correct?
A
An ultraviolet wave has less energy than an infrared wave.
B
A radio wave has a shorter wavelength than a gamma ray wave.
C
A radio wave has more energy than a microwave.
D
An X-ray wave has a higher frequency than an infrared wave.
Which statement best describes diffraction?
A
Light energy is absorbed by surrounding matter.
B
Light slows down as it passes through a medium.
C
Light bounces off a medium.
D
Light bends around an object.
The visible light spectrum from its longest to shortest wavelength is...
A
Infrared, red, orange, yellow, green, blue, indigo, violet, ultraviolet.
B
Red, orange, yellow, green, blue, indigo, violet.
C
Ultraviolet, violet, indigo, blue, green, yellow, orange, red, infrared.
D
Violet, indigo, blue, green, yellow, orange, red.
Which of the following statements about how light waves travel is correct?
A
Light waves travel faster through solids than through air.
B
Light waves travel the fastest through liquids and slowest through the air.
C
Light waves travel faster through the air than through solids.
D
Light waves travel the fastest through solids and slowest through liquids.
A model of a concave lens is shown in the diagram. Which of the following describes a possible application of this type of lens?
A
Concave lenses can be used in laser pointers to converge the projected light to a single point.
B
Concave lenses can be used in mirrors to make objects appear closer than they truly are.
C
Concave lenses can be used in car headlights to spread the projected light outwards.
D
Concave lenses can be used in microscopes to make small objects appear larger.
Mrs. Lewis places a stick in a pond. When she looked down at the stick, it appeared to be broken at the point where the stick entered the water. This was caused by:
A
absorption of light waves by the stick.
B
refraction of light waves passing from air into water.
C
diffraction of light waves around the stick.
D
reflection of light from the water.
Renee looks out a window. The window is clear, or transparent. This means most of the light that hits the window is:
A
reflected
B
scattered
C
absorbed
D
transmitted
When the energy of a wave increases, the increases.
A
energy
B
frequency
C
electricity
D
wavelength
When the energy of a wave increases, the increases.
A
energy
B
frequency
C
electricity
D
wavelength
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Please help if i fail this test im gonna fail:((
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