Light & Vision (The Basics)
How does our ability to see any object depend on the interaction of light?
a. Light must scatter in all directions from the object.
b. Light must refract through the object to be visible.
c. Light must reflect off the object and enter our eyes.
d. Light must be absorbed by the object to be visible.
c. Light must reflect off the object and enter our eyes.
In a one-way mirror, which part of the glass allows some light to transmit through?
a. The gaps in the silver layer
b. Impurities and dust on the glass
c. The paint layer
d. The thick silver layer
a. The gaps in the silver layer
Which structure of the eye adjusts its size to control how much light enters?
a. Retina
b. Pupil
c. Optic Nerve
d. Lens
b. Pupil
What occurs when light bounces off a surface?
a. Absorption
b. Refraction
c. Transmission
d. Reflection
d. Reflection
You stand outside looking at a window on a sunny day with NO lights on inside the building. Which are easiest to see?
a. The computer and desk inside
b. The trees and sky reflected on the glass
c. People walking inside the building
d. The dark interior walls
b. The trees and sky reflected on the glass
Name the material that allows us to see through it while still reflecting some light.
a. white plastic
b. glass
c. regular mirror
d. opaque mirror
Glass
What happens to light after it shines on a teacher in front of a one-way mirror?
a. Some of the light that reflects off the teacher is destroyed.
b. Some of the light that reflects off the teacher transmits back through the one-way mirror to the student’s eyes.
c. All of the light is absorbed by the mirror.
d. Some of the light that reflects off the teacher transforms into sound waves.
b. Some of the light that reflects off the teacher transmits back through the one-way mirror to the student’s eyes.
Where must light land in order for the eye to form a focused image?
a. Retina (back of the eye)
b. Cornea
c. Iris
d. Lens
a. Retina (back of the eye)
What occurs when light passes completely through a material?
a. Absorption
b. Transmission
c. Destruction
d. Reflection
b. Transmission
Why are outdoor objects (like trees and sky) easiest to see in a window reflection on a bright sunny day?
a. The glass absorbs all light coming from outside.
b. Sunlight reflecting off outdoor objects onto the glass is much brighter than dim light coming from inside.
c. Light inside the building is bouncing off the glass back inside.
d. Outdoor objects transmit light directly through the window glass.
b. Sunlight reflecting off outdoor objects onto the glass is much brighter than dim light coming from inside.
What role does the brain play in the process of seeing?
a. It combines the views from both eyes into one picture.
b. It controls the size of the cornea.
c. It turns the image upside down.
d. It helps control the color of the iris.
a. It combines the views from both eyes into one picture.
Where does light go when a teacher stands in front of a one-way mirror?
a. Some travels back to the teacher's eyes, and some transmits to the observer on the other side.
b. It only reflects back to the teacher.
c. It gets trapped inside the glass layer.
d. It is completely absorbed by the room's walls.
a. Some travels back to the teacher's eyes, and some transmits to the observer on the other side.
What is the primary function of the lens and cornea?
a. To carry signals directly to the brain
b. To absorb excess light entering the eye
c. To bend and focus light onto the back of the eye
d. To give the eye its unique color
c. To bend and focus light onto the back of the eye
What occurs when light is taken in by a material and not reflected or transmitted?
a. Absorption
b. Reflection
c. Refraction
d. Transmission
a. Absorption
How can you make objects inside a dark building visible to someone standing outside?
a. Shine a flashlight at the reflection on the glass
b. Turn on the lights inside so light can reflect off the objects and transmit through the window
c. Use a thicker glass window
d. Paint the outside of the glass black
b. Turn on the lights inside so light can reflect off the objects and transmit through the window
How do eyeglasses help correct vision problems?
a. By changing the color of the eyes.
b. By adjusting the size of the pupils.
c. By making the eyes shorter from front to back.
d. By allowing the eye to focus light in the right spot on the retina.
d. By allowing the eye to focus light in the right spot on the retina.
What primary light interaction occurs when light hits the silver coating of a one-way mirror?
a. Absorption
b. Refraction
c. Scattering
d. Reflection
d. Reflection
How do corrective lenses (eyeglasses) fix blurry vision?
a. By enlarging the pupil to let in more light
b. By filtering out dark colors
c. By altering the path of light so it focuses accurately on the retina
d. By shrinking the size of the eyeball
c. By altering the path of light so it focuses accurately on the retina
Why can you see both a reflection and objects through a glass window?
a. Glass only reflects light.
b. Glass only transmits light.
c. Glass both reflects some light and transmits some light.
d. Glass absorbs all light and converts it into visual images.
c. Glass both reflects some light and transmits some light.
Why is it hard to see an object in a completely dark room?
a. Light waves travel slower making it harder to see.
b. There is no light source to reflect off the object and enter your eyes.
c. Dark rooms absorb the light.
c. The light source transmits the light to another area.
b. There is no light source to reflect off the object and enter your eyes.
Why is it essential for the lens, cornea, and pupil to work together properly in the eye?
a. To determine the color of the iris
b. To create electrical signals
c. To focus light on the back of the eye
d.To detect patterns of light
c. To focus light on the back of the eye
Why can a person in a bright room only see their reflection in a one-way mirror?
a. The light reflecting off their side is much brighter than the light transmitting from the dark side.
b. No light passes through from the dark room.
c. Light is destroyed as it tries to pass through the glass.
d. The dark side absorbs all light before it reaches the mirror.
a. The light reflecting off their side is much brighter than the light transmitting from the dark side.
What turns light patterns into signals that the brain can interpret as images?
a. Retina and optic nerve
b. Pupil
c. Iris
d. Cornea
a. Retina and optic nerve
What happens to light energy when it hits an object?
a. It can be destroyed upon contact.
b. It turns into sound waves instantly.
c. It can be reflected, transmitted, or absorbed.
d. It always bounces off at a 90-degree angle.
c. It can be reflected, transmitted, or absorbed.
What happens to the light that hits a black car on a hot, sunny day?
a. Most light is transmitted through the car body.
b. Most light is reflected into the driver's eyes.
c. Most light is absorbed by the dark surface and transformed into heat.
d. All light is destroyed upon impact with the metal.
c. Most light is absorbed by the dark surface and transformed into heat.