DP1 Physics- Wave Behaviour

DP1 Physics- Wave Behaviour

Objective: To understand the concept of total internal reflection, diffraction, double source interference.

Learning outcome: Reflect on the learning by participating in summarization & exit ticket.

Focused skill: Critical thinking

Open Ended

RECAP:

Q: What is total internal reflection?

State any real life example of diffraction phenomenon.

Explain the phenomenon seen in the image. What is critical angle?

Conditions for Total internal reflection

1. Light ray should travel from denser to rarer medium.

2. The angle of incidence in the denser medium should be greater than critical angle.

Critical angle

Sin i_c = 1/ ₁n₂

_{where Ic = critical angle}

₁n_{2 = refractive index of the medium}

Multiple Choice

Find the critical angel of light traveling from diamond (n= 2.42) to air (n=1.00).

• 24.4

• 31.2

• 44.6

• 51.1

Multiple Choice

If the critical angle from a material to air is 30⁰, the refractive index of the material will be....

• 1

• 1.5

• 2

• 2.5

What property of light you are observing?

Explain with the help of the adjoining diagrams.

Open Ended

Answer the question as seen in the image.

Open Ended

Summarize the learning for today. Have you achieved the learning outcome?

Poll

Exit Ticket:

What do you feel about your understanding of the topics discussed today?

• I have understood the topics clearly and will be able to answer questions of all difficulty levels.

• I have somewhat understood the topics and will be able to answer questions of moderate to easy level.

• I have not understood the topics clearly and will be not able to answer questions of all difficulty levels.