Here is an example of a lesson note on the topic of refraction of light for a high school physics class:
Title: Refraction of Light
Grade level: High School
Objective:

• Students will be able to define refraction of light and understand the laws governing it.
• Students will be able to explain how refraction occurs and give examples of situations in which it occurs.
• Students will be able to calculate the angle of refraction using Snell’s law.

Materials:

• Whiteboard and markers
• Refraction simulation app or software
• Index of refraction table
• Protractor

Introduction (5 minutes):

• Ask students if they have ever noticed a straw appearing to bend when placed in a glass of water.
• Introduce the topic of refraction of light, defining it as the bending of light as it passes from one medium to another with a different refractive index.
• Explain that the goal of the lesson is to understand how and why this happens.

Direct Instruction (15 minutes):

• Review the concepts of reflection and transmission of light.
• Introduce Snell’s law and explain how it is used to calculate the angle of refraction.
• Show a simulation of light passing through different media, demonstrating how the angle of incidence affects the angle of refraction.
• Provide examples of refraction in everyday life, such as the mirage on a hot road or the apparent bending of objects when viewed through a glass of water.

Guided Practice (15 minutes):

• Distribute index of refraction tables and protractors to students.
• Provide a worksheet with several problems in which students must calculate the angle of refraction using Snell’s law.
• Walk around the room to answer any questions and provide guidance as necessary.

Independent Practice (15 minutes):

• Assign a homework assignment that requires students to identify and explain situations in which refraction occurs in everyday life.
• Encourage students to be creative and think outside the box in their examples.
• Collect the assignments at the beginning of the next class.

Closure (5 minutes):

• Review the key points of the lesson, emphasizing the importance of understanding how light behaves when passing through different media.
• Encourage students to continue thinking about and observing the effects of refraction in their everyday lives.