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Learn it your way
A short class with Sarah and her students. The other ways are under More.
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Today, we're going to create a rainbow using a prism! Who can tell me what happens when light passes through a prism?
I think it bends and separates into colors!
Exactly! This phenomenon is called dispersion. The prism splits light into its component colors: red, orange, yellow, green, blue, indigo, and violet. Can you remember those colors with the acronym ROYGBIV?
Yes! ROYGBIV for the rainbow!
Perfect! Let's set up the experiment now.
Now that we have seen how a prism works, let's experiment with refraction. Can anyone remind us what refraction is?
It's when light bends as it passes from one medium to another!
Exactly! Like when you see a straw in a glass of water appearing bent. Today, we'll measure refraction angles in water and other liquids. What do you think will happen?
I think it will bend differently depending on the liquid!
Great prediction! Remember, we will measure both the incident angle and the refracted angle. Let’s get started!
Finally, let's each make a pinhole camera. Can anyone share how light travels in a straight line?
Light always travels in straight lines until it hits something!
Exactly! Now, we will create a simple pinhole camera to demonstrate that. You'll make a small hole in a cardboard box, and we'll see how the light paths create an image!
I like the idea of seeing the outside world in reverse!
That's a great observation! It helps illustrate how lenses in cameras work as well. Let's start building.
To see a rainbow bright, use a prism in the light.
Imagine a brave little light ray journeying through a prism, eager to show all its colors to the world.
Remember ROYGBIV to recall the colors of the rainbow.
PRISM: 'Pathway Reflecting In Splendid Medium' helps to recall how light interacts.
Term
What causes a rainbow?
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Term
What does a pinhole camera demonstrate?
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The separation of light into its component colors when it passes through a prism.
The bending of light as it passes from one medium into another medium with a different density.
A simple camera without a lens, consisting of a box or chamber with a small hole to allow light in.
This section explores various activities to demonstrate the principles of light, including experimentation with prisms and building optical devices.
The activities section includes engaging experiments that allow students to explore the properties of light through practical applications, like creating rainbows with prisms and constructing pinhole cameras.
In this section, students engage in hands-on activities that provide direct experiences with the properties of light. The primary activities involve creating a rainbow using prisms and measuring refraction angles in different liquids. Additionally, students will build a pinhole camera to visualize light paths, reinforcing concepts learned in previous sections about light behavior, reflection, and refraction. These activities are designed to enhance understanding through exploration and experimentation, allowing students to directly observe and measure physical phenomena related to light.