Seeing and Light
What must happen for us to see an object?
Light must leave a light source, bounce off the object, and enter our eyes.
What two things can a one-way mirror do?
Reflect and let light pass through.
When light bounces off a surface, it is called what?
Reflection
When light hits the eye, it turns into a signal sent to the _____.
Brain
What causes the one-way mirror effect?
A difference in light between two sides.
True or False: Light can bend when it goes through different materials.
True — this is called refraction.
The one-way mirror looks like a mirror on the ____ side.
Lit side or Bright Side
When light passes through a surface, it is called what?
Transmission
What organ sends messages from the eyes to the brain?
The optic nerve
Why do we sometimes see different things when looking at the same object?
Because of differences in how light hits or passes through the object.
Draw (or describe) what happens when light hits a mirror.
It reflects back in a straight line.
What happens if both rooms are dark?
You can’t see anything clearly.
Which material reflects the most light — glass, one-way mirror, or regular mirror?
Regular mirror
Why doesn’t the student see the teacher through the one-way mirror?
The reflection from his own side is stronger, so his brain focuses on it.
The brighter side of the mirror shows the reflection. Why?
Because more light is reflected back to the eyes.
Which travels faster — light or sound?
Light
Why can the teacher see the student through the one-way mirror?
More light is on the student’s side, so light travels through to the darker side.
Draw or describe what happens when light hits a one-way mirror.
Some light reflects, some passes through.
What part of the eye bends light to help us focus?
Lens
What are two science ideas that explain this unit?
Light reflection and light transmission.
Fill in the blank: Light travels in ______ lines.
Straight
Select all that are true: ☐ The mirror is fully silvered ☐ The mirror is half-silvered ☐ It transmits some light ☐ It absorbs all light
✅ Half-silvered and ✅ transmits some light
Why does the one-way mirror only partly reflect light?
It has a thin layer of silver instead of a full one.
True or False: Our brain can only focus on one light signal at a time.
True
CER Question: Why can the music student see himself but not the teacher?
Claim: He sees himself because more light reflects back to him. Evidence: Light from the lit side reflects strongly. Reasoning: His brain focuses on the stronger light signal.