Light Reflection, Transmission, and Human Vision Unit Test

Question 1

When light shines on an object, which THREE behaviors can occur?

Accepted Answer

Reflection, absorption, and transmission

Question 2

A one-way mirror is described as 'half-silvered.' What does this mean about its structure?

Accepted Answer

Only half of the glass surface is coated with a thin reflective layer, leaving some parts exposed

Question 3

A student shines a flashlight at a one-way mirror from the bright side. What does the student see when looking at the mirror?

| Side | Light Level | What is seen |
|------|-------------|---------------|
| Side A (flashlight side) | Bright | ? |
| Side B (opposite side) | Dark | Window |

Accepted Answer

A mirror reflection of themselves

Question 4

Which statement best describes how light travels through a material like air or glass?

Accepted Answer

Light travels in straight lines until it reaches a surface between different materials

Question 5

A student sets up two boxes connected by a one-way mirror. The table below shows the results of the investigation.

| Trial | Box A Light | Box B Light | Box A observer sees | Box B observer sees |
|-------|-------------|-------------|---------------------|---------------------|
| 1     | On          | Off         | Mirror              | Window              |
| 2     | Off         | On          | Window              | Mirror              |
| 3     | On          | On          | Tinted film         | Tinted film         |

What conclusion is best supported by the data?

Accepted Answer

The amount of light on each side determines whether the one-way mirror acts as a mirror or a window

Question 6

In the human eye, what is the role of the lens?

Accepted Answer

To bend incoming light so it focuses on the retina

Question 7

After light enters the eye and is focused on the retina, what happens next so that a person can see an image?

Accepted Answer

The retina converts light signals into electrical signals that travel along the optic nerve to the brain

Question 8

A regular mirror and a one-way mirror are both made with reflective material. What is the key structural difference that makes a one-way mirror behave differently from a regular mirror?

Accepted Answer

A one-way mirror has a much thinner reflective coating, leaving some transparent areas

Question 9

A scientist uses a light sensor to measure the amount of light transmitted through four different materials. The results are shown in the table below.

| Material         | Light Transmitted (%) | Light Reflected (%) |
|------------------|-----------------------|---------------------|
| Clear glass      | 90                    | 10                  |
| One-way mirror   | 40                    | 60                  |
| Regular mirror   | 2                     | 98                  |
| Black cardboard  | 0                     | 5                   |

Based on the data, which material would allow someone on the dark side to see through to the bright side most clearly?

Accepted Answer

Clear glass, because it transmits the most light

Question 10

A student claims: 'A one-way mirror reflects more light than it transmits. This means it will always look like a mirror from both sides.' Which evidence from the box model investigation best shows why this claim is incorrect?

Accepted Answer

When the bright side is lit and the dark side is unlit, the dark side observer sees through the mirror even though more light is reflected overall

Light Reflection, Transmission, and Human Vision Unit Test

Adaptive Selected Response

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