Wave Communications

Wave Communications

Usage

Multiple Choice

Infrared rays have a shorter wavelength than

• Ultraviolet ray.

• X-rays.

• radar waves.

• gamma rays

Multiple Choice

To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its

• wavelength.

• intensity.

• refraction.

• amplitude.

Multiple Select

Information is sent along optical fibres using ______ Satellite dishes on Earth use ______ to communicate with orbiting satellites. Mobile phones receive ______ signals.

• radiowave, microwave, infrared

• infrared, microwave, microwave

• infrared, radiowave, radiowave

• microwave, microwave, infrared

Multiple Choice

What is the correct equation for calculating wave speed?

• wave speed = frequency / wavelength

• wave speed = frequency x wavelength

• frequency = wave speed x wavelength

Fill in the Blanks

Multiple Select

Which EM waves can be used for communications?

• Radiowaves

• Microwaves

• UV Rays

• Visible light

• Infrared

Multiple Choice

Which electromagnetic wave has the longest wavelength?

• Gamma Wave

• Microwaves

• X Rays

• Radio Waves