Topic 10: Sound and Light


Light is electromagnetic radiation that has properties of waves

Light follows the Law of Reflection: “The angle of incidence is equal to the angle of reflection.” Light can bounce off materials in two ways: diffuse and regular reflection

Refraction allows light to bend/refract when it changes speed

Light travels faster in air, slow in water and slower still in glass

Waves have many properties, including frequency, wavelength, amplitude, timbre, and direction

A high frequency wave is one where there are a lot of vibrations per second

A low frequency wave is one where there are few vibrations per second

Sound is measures in decibels

What was the point of this activity?

The point of this was to allow students to see how light can be reflected and refracted from different angles of a mirror.

Explain how you would introduce this to your class?

I could start by reading a nonfiction book to them about sound and light so they can loosely get an idea of what we are going to talk about. Then i would have them write down questions they had about sound and light.

Where do you see a student having difficulty with this?

I think students could struggle lining up the mirrors correctly, depending on the age and accurately drawing what they see.

What changes or extensions could you do to this activity?

I could use larger mirrors so see if it made a difference in the outcome and i could also find animations to further help their understanding. 

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