Properties of Electromagnetic Waves

Properties of waves

by Allanthna

​2 types of waves

vibration is parallel to the direction of wave motion​

​

Eg =====> SOUND

vibration is perpendicular to the direction of wave motion​

Eg ========>

Electromagnetic Waves

and water wave

​A : Amplitude - maximum height of the particle vibrating from its resting position

​

​B : Wavelength ( - distance between two peaks

​

​C : Frequency (f) - number of waves in one second (Unit is Hz)

Multiple Choice

How many types of waves are there????

• 1 type,

  Electromagnetic wave

• 2 types,

  Electromagnetic waves & Transverse wave

• 3 types,

  Longitudinal Wave, Electromagnetic Wave, & Transition wave

• 2 types,

  Transverse Wave & Longitudinal Wave

Multiple Choice

What type of wave is shown in the picture?

And what is A and what is B?

• Longitudinal Wave.

  A - Wavelength

  B - Amplitude

• Transverse Wave.

  A - Amplitude

  B - Wavelength

• Transverse Wave.

  A - Wavelength

  B - Amplitude

• Longitudinal Wave.

  A - Amplitude

  B -Wavelength

​Electromagnetic Waves

From Radiowave to Gamma Rays :

​Wavelength decreases

​Frequency increases

​

​From Gamma Rays to Radiowave :

​Wavelength ???

​Frequency ???

​Properties of Electromagnetic Waves

​1. They are TRANSVERSE WAVES

​

​2. All Electromagnetic Waves travel at the same speed

=====> 3.0 x 10⁸

​

​3. Can travel through vacuum

​Differences between .....

​LONGITUDINAL

​

​1. CANNOT travel through vacuum

​

​2. Vibration is along the direction of motion

​TRANSVERSE

​

​1. CAN travel through vacuum

​

​2. Vibration is perpendicular to the direction of motion

​CALCULATION TIME......

​ONLY ONE FORMULA YOU NEED TO REMEMBER!

​

​SPEED = FREQUENCY x WAVELENGTH

​

​v = f x

Multiple Choice

A tidal wave has wavelength of 150km. 5 waves are produces in one hour. Calculate the speed at which the wave travels. Answer in km/h

• 700 km/h

• 70.5km/h

• 750km/h

• 70 km/h

Multiple Choice

A rope produce waves at the rate of 7 Hz, and the speed is 2.1 m/s. What is the wavelength?

• 0.3 m

• 3.0 m

• 0.22 m

• 2.1 m