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3.2. Light and Shadow Activities

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Questions and Answers

What is the primary reason that shadows are formed?

Light travels in straight lines until blocked. (correct)

Light can bend around objects.

Shadows only form at night.

Light reflects off surfaces to create shadows.

What characteristic of a shadow is affected by the size of the light source?

The shape of the shadow. (correct)

The density of the shadow.

The duration of the shadow.

The color of the shadow.

Which of the following best describes a non-transparent object in the context of shadow formation?

An object that partially reflects light but lets some pass.

An object that blocks light completely. (correct)

An object that diffuses light in multiple directions.

An object that allows light to pass through entirely.

How does the movement of the sun affect the position of shadows throughout the day?

Shadows shift based on the sun's angle and position in the sky. (A) Signup and view all the answers

Why is it important to draw straight lines to represent rays of light?

Straight lines accurately depict the direction of light travel. (A) Signup and view all the answers

What determines the size of a shadow cast by an object?

The distance of the object from the light source (A) Signup and view all the answers

Which component of the eye functions similarly to a camera lens?

Cornea (C) Signup and view all the answers

In a dark room setup, what does the semi-translucent page allow you to observe?

An inverted and distorted image (A) Signup and view all the answers

What is a primary function of light-sensitive cells in the retina?

To convert light into electrical signals (A) Signup and view all the answers

What happens to shadows as the sun moves across the sky?

They change direction and size (A) Signup and view all the answers

Study Notes

Activities 3.2: Large and Small Shades

Shadows change direction and size as the sun moves.
Animal shadows appear longer depending on the animal's position relative to the sun.
The size of a shadow changes depending on the position of the light source.

Activities 3.3: Dark Room

A cardboard box can be used to demonstrate image formation.
A semi-translucent page is placed inside the box to display an inverted image.
The image's size, clarity, and position can be adjusted by slightly moving translucent pages within the box.
The dark room is a simple photographic camera.
Light rays reflect off objects and are captured by a lens to form an image.
The lens focuses light onto a film or sensor in the camera.
The eye works in a similar way, using the lens and cornea to focus light rays onto the retina.
Light-sensitive cells in the retina transform the light into signals sent to the brain.

Briefing

A light radius is a straight line representing a light ray.
A shadow is formed when a non-translucent object blocks light.

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Description

Explore the fascinating concepts of light and shadow through engaging activities. Learn how shadows change with the sun's position and how a simple dark room setup can demonstrate image formation. This quiz will help you understand the principles of light behavior and vision.