Lesson Notes By Weeks and Term v4 - SHS 2
WAVES
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WAVES
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Subject: Physics
Class: SHS 2
Term: 1st Term
Week: 17
Grade code: 2.2.2.LI.2
Strand code: 2
Sub-strand code: 2
Content standard code: 2.2.2.CS.1
Indicator code: 2.2.2.LI.2
Theme: ENERGY
Subtheme: WAVES
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Welcome, future scientists and engineers! Today, we delve into the fascinating world of waves. Waves are all around us, even if we don't always see them. They are how we hear the beat of an 'adowa' drum, how a radio station in Accra broadcasts news to someone in Kumasi, and how the sun's warmth reaches us. Understanding waves is fundamental because they are the primary way energy is transferred from one place to another. In this lesson, we will learn how to categorise or classify the different types of waves based on their properties. This skill is like a biologist classifying animals—it helps us understand, predict, and use their behaviour.
What is a Wave?
At its core, a wave is a disturbance or vibration that travels through a medium or space, transferring energy from one point to another without causing a permanent displacement of the medium itself.
Think about the sea at Labadi Beach. The water itself doesn't travel all the way from the deep sea to the shore. Instead, the *energy* travels through the water, causing it to move up and down in a wave pattern. The water molecules mostly stay in the same location.
We classify waves in different ways based on their characteristics. Let's look at three main pairs of classification. Classification 1: Based on Direction of Vibration