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The Eye
Light & The Eye
Color
More Color
The Spectrum of Color
100
1. Most objects can be seen because they _____. A) bend light waves B) reflect light waves C) absorb light waves D) transmit light waves
What is B) reflect light waves
100

Which describes the correct path light takes that allows a person to see a tree?

A) Light reflects off the tree, enters the eye through the lens, and signals are sent to the brain.
B) Light travels from the eye to the tree and then back to the brain.
C) Light is absorbed by the brain and then reflected to the eye.
D) Light passes from the tree directly to the brain without entering the eye.

A) Light reflects off the tree, enters the eye through the lens, and signals are sent to the brain.

100
What happens when white light strikes a black object? A) Blue light is reflected. B) Red light is reflected. C) No light is reflected. D) All of the light is reflected.
What is C) no light is reflected?
100
Why does a stop sign appear red? A) It absorbs red light. B) It reflects red light. C) It refracts red light. D) It reflects all colors except red
What is B) if reflects red light?
100
Which statement most accurately describes the relationship between frequency, wavelength, and energy on the electromagnetic spectrum? A) The higher the frequency, the longer the wavelength and the higher the energy. B) The longer the wavelength, the lower the frequency and the lower in energy.
What is B) longer wavelength means a lower frequency.
200
2. The transparent front surface of the eye where light first passes through is called the _____. A) cornea B) iris C) pupil D) retina
What is A) cornea?
200
Where within the eye does the lens focus the light waves? A) the back of the eye (retina) B) the cornea & the lens
What is retina?
200
How would a red apple look under blue light? A) The apple would appear black. B) The apple would appear white. C) The apple would still appear red. D) The apple would seem to disappear.
What is A) the apple would appear black?
200

When sunlight shines on a leaf, the leaf appears green. Why does the leaf look green?

A) It absorbs all colors of light equally.
B) It absorbs only the green wavelengths of light.
C) It reflects green wavelengths of light and absorbs most of the other visible wavelengths.
D) It changes white light into green light.

C) It reflects green wavelengths of light and absorbs most of the other visible wavelengths.

200

Which of the following statements about the electromagnetic spectrum is accurate?

A) All types of electromagnetic radiation require a medium to travel.
B) Infrared and ultraviolet radiation have the same wavelength.
C) Only a small portion of the electromagnetic spectrum is visible to humans.
D) Radio waves have shorter wavelengths than gamma rays.
E) Visible light has more energy than X-rays.



C) Only a small portion of the electromagnetic spectrum is visible to humans.

300
The signals generated by the nerves in the retina are carried to your brain by the _____. A) cornea B) pupil C) optic nerve D) lens
What is the C) optic nerve?
300
Light waves enter the eye and pass through which two transparent parts? A) Optic nerve and eyeball B) Cornea and retina C) Pupil and iris D) Cornea and lens
What is D) cornea & lens?
300
Which behavior of light must happen if the color of an opaque object is going to be seen? A) refraction B) absorption C) transmission D) reflection
What is D) reflection?
300

All of the following processes can cause colors to be perceived by the human eye EXCEPT:

A) Absorption of certain wavelengths by materials
B) Refraction of white light through a prism
C) Reflection of specific wavelengths into the eye
D) Complete absorption of all wavelengths of visible light

D) Complete absorption of all wavelengths of visible light

300
Which of the following electromagnetic waves has the shortest wavelength? A) ultraviolet B) red light C) green light D) infrared
What is A) ultraviolet?
400
Light is focused by the lens to the back of the eye on the _____. A) cornea B) iris C) pupil D) retina
What is D) retina?
400
As light waves enter the eye, which sequence shows the path light travels to allow sight to occur? A) Cornea, lens, retina, optic nerve B) Lens, cornea, optic nerve, retina C) Cornea, retina, lens, optic nerve D) Optic nerve, retina, cornea, lens
What is B) lens, cornea, optic nerve retina?
400
If a material absorbs all the light waves that reach it, which color will the human eye see? A) white B) black C) red D) violet
What is B) black?
400

A projector emits red light. When a red filter is placed in front of the beam, red light passes through. When a blue filter or a green filter is placed in front of the red beam, no light passes through.

Which of the following statements is supported by these observations?

A) Red light is transmitted through a red filter but absorbed by blue and green filters.
B) All filters transmit red light equally.
C) Blue and green filters change red light into other colors.
D) Red light can pass through any colored filter.
E) Filters only reflect light and never absorb it.

A) Red light is transmitted through a red filter but absorbed by blue and green filters.

400
The frequency of violet light is _____ that of yellow light. A) higher than B) lower than C) the same as D) faster than
What is A) higher than?
500
Inside the eye, the nerves in the _____ are sensitive to different kinds and colors of light. A) retina B) pupil C) iris D) cornea
What is A) retina?
500

Why must light be refracted by the lens of the eye?

A) To regulate the amount of light entering through the pupil
B) To focus incoming light onto the retina so a clear image can form
C) To ensure the image is formed in the center of the eye
D) To allow the iris to adjust in response to brightness

B) To focus incoming light onto the retina so a clear image can form

500
What happens when all the light waves of the visible spectrum are reflected together? A) You see white. B) You see black. C) You see a rainbow of colors. D) You see no colors at all.
What is A) you see white?
500

A piece of cloth appears red through a red filter, green through a green filter, and blue through a blue filter. What color is the cloth? 

White

500
. _____ energy is transmitted by infrared radiation. A) Electrical B) Heat C) Magnetic D) Sound
What is B) heat?