Physics SS 3 Curriculum Guides (Waves and Motion without Material Transfer) – Electromagnetic Waves and Properties of Waves

THEME – WAVES, MOTION WITHOUT MATERIAL TRANSFER

INSTRUCTIONAL MATERIALS

• Spectrum chart
• Slinky
• Oscilloscope

LEARNING OBJECTIVES

By the end of the lesson, students should be able to:

1. distinguish between electromagnetic waves and mechanical waves.

2. list the six radiation in the electromagnetic spectrum in order of increasing wavelength and increasing frequency.

3. state some uses of electromagnetic waves.

4. apply the formula v = fλ to solve simple problems relating to electromagnetic waves.

FOCUS LESSONS

Electromagnetic Spectrum

LESSON PRESENTATION

TEACHER’S ACTIVITIES

The teacher,

1. shows picture/chart of electromagnetic spectrum.

2. leads discussion on different types of radiation in the electromagnetic spectrum.

3. shows the position of the visible spectrum in the electromagnetic spectrum.

STUDENT’S ACTIVITIES

The students,

1. discuss the different types of radiation in the electromagnetic spectrum.

2. identify the position of the visible spectrum in the electromagnetic spectrum.

LESSON EVALUATION

Students to,

1. differentiate between electromagnetic and mechanical waves.

2. List the radiations in the electromagnetic spectrum in order of increasing frequency and wavelength.

3. use the formula v = fλ to solve simple problems.

THEME – WAVES, MOTION WITHOUT MATERIAL TRANSFER

INSTRUCTIONAL MATERIALS

Ripple tank, accessories and polaroid.

LEARNING OBJECTIVES

By the end of the lesson, students should be able to:

1. state and explain four properties of waves.

2. demonstrate interference of waves.

3. demonstrate polarization of light waves.

4. demonstrate diffraction of waves.

FOCUS LESSONS

1. Interference of Waves –  light and sound

2. Diffraction of Waves – sound and light

3. Polarization of Light – application in polaroid only.

LESSON PRESENTATION

TEACHER’S ACTIVITIES

The teacher,

1. sets up the ripple tank for students to observe wave patterns.

2. demonstrates the interference of two circular water waves from the ripple tank.

3. demonstrates diffraction patterns with circular waves.

4. demonstrates to students the use of candle flame to show interference of light.

5. shows picture/chart of interference and diffraction patterns.

STUDENT’S ACTIVITIES

The students,

1. observe interference of two circular water waves from the ripple tank.

2. observe diffraction patterns with circular waves.

3. observe interference of light obtained from the use of candle flame.

LESSON EVALUATION

Students to,

1. diffraction, interference of light and sound.

2. polarization of light

3. application of polaroid.