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Light is considered an electromagnetic wave made of alternating electric and magnetic fields (see bottom page of this link)
Light is considered an electromagnetic wave made of alternating electric and magnetic fields (see bottom page of this link)
Since light is a wave, it also have different behaviors (reflection, refraction, diffraction, absorption, scattering, transmission)
Since light is a wave, it also have different behaviors (reflection, refraction, diffraction, absorption, scattering, transmission)
Out of the entire electromagnetic spectrum, humans can only see a very specific band of light. Scientists call this band visible light
Out of the entire electromagnetic spectrum, humans can only see a very specific band of light. Scientists call this band visible light
Visible light is arranged based on increasing frequency. There is a simple way to remember the order. Look familiar?
Visible light is arranged based on increasing frequency. There is a simple way to remember the order. Look familiar?
All the objects we see in our everyday life either reflect or absorb specific wavelengths of light. This gives the object its color.
All the objects we see in our everyday life either reflect or absorb specific wavelengths of light. This gives the object its color.
Look at these three balls to the right.
Look at these three balls to the right.
All of these balls are the same size, but they are different colors. Why?
All of these balls are the same size, but they are different colors. Why?
The ball appears white when all the colors are reflected back into our eyes
The ball appears white when all the colors are reflected back into our eyes
The ball appears red when ONLY red is reflected into our eyes
The ball appears red when ONLY red is reflected into our eyes
The ball appears black when no color is being reflected
The ball appears black when no color is being reflected
Scientists use a special tool called a prism to study light.
Scientists use a special tool called a prism to study light.
Prisms work by refracting the incoming light. As light passes through the prism, it slows and bends, but different wavelengths bend at different angles. This separates light into different wavelengths, forming a rainbow of colors
Prisms work by refracting the incoming light. As light passes through the prism, it slows and bends, but different wavelengths bend at different angles. This separates light into different wavelengths, forming a rainbow of colors
We can manipulate incoming light using special tools called lenses.
We can manipulate incoming light using special tools called lenses.
Lenses are transparent objects with one or two curved surfaces.
Lenses are transparent objects with one or two curved surfaces.
Lenses work by refracting incoming light to form an image
Lenses work by refracting incoming light to form an image
Convex lenses are lenses thicker in the middle than at the edges.
Convex lenses are lenses thicker in the middle than at the edges.
Convex lenses focus the light onto a specific point
Convex lenses focus the light onto a specific point
Concave lenses are lenses thicker at the edges
Concave lenses are lenses thicker at the edges
Concave lenses spread out the incoming light
Concave lenses spread out the incoming light
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