tere flashcard

Front

What are radio waves?

Back

Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. They are used for communication, broadcasting, and various technologies.

Front

How do radio waves facilitate communication?

Back

Radio waves carry information through modulation, allowing for the transmission of voice, data, and video over long distances.

Front

What is an example of a device that uses radio waves?

Back

A mobile phone uses radio waves to communicate with cell towers, enabling voice calls and data transmission.

Front

What is the role of a microwave oven in relation to radio waves?

Back

A microwave oven uses microwave radiation, a type of radio wave, to heat food by causing water molecules to vibrate.

Front

What is NOT an application of radio waves?

Back

X-ray imaging is not an application of radio waves; it uses X-rays, which are a different part of the electromagnetic spectrum.

Front

What factors can weaken a radio wave signal?

Back

Obstacles like walls and buildings can weaken radio wave signals by absorbing or reflecting the waves.

Front

What is the frequency range of radio waves?

Back

Radio waves typically have frequencies ranging from 3 kHz to 300 GHz.

Front

What is modulation in the context of radio waves?

Back

Modulation is the process of varying a carrier signal in order to encode information for transmission.

Front

What is the difference between AM and FM radio?

Back

AM (Amplitude Modulation) varies the amplitude of the carrier wave, while FM (Frequency Modulation) varies the frequency.

Front

How do Bluetooth devices use radio waves?

Back

Bluetooth devices use short-range radio waves to connect and communicate wirelessly with other devices.