Unit 4 - Concepts and Units 1

Units for wavelength

• meters

• seconds

• s^–1

• W/m²

Units for frequency

• meters

• seconds

• s^–1

• W/m²

Speed of sound is

• 340 m/s

• 340 x 10⁸ m/s

• 3 x 10⁸ m/s

Speed of EM in vaccum is

• 340 m/s

• 340 x 10⁸ m/s

• 3 x 10⁸ m/s

Formula for Intensity of a wave is

• Power / Area of propagation

• Power / Distance

• Power * Area of propagation

• Power * Distance

What is I = I₀Cos²θ ?

• Malus' Law

• Snell's Law

• Faraday's Law

• Lenz's Law

What is this formula?

• Malus' Law

• Snell's Law

• Faraday's Law

• Lenz's Law

Formula for refractive index:

Diffraction is

• Bending of wave through aperture or around obstacles

• Changing speed of the wave by changing medium.

• Bending of wave through aperture and changing the ƒ.

• Changing speed of the wave without changing medium.