Practice Question

1.Describe a use for Radio waves

Communication: used in AM and FM radio, television signals, and digital radio.

Wi-Fi: Wireless internet uses radio waves to transmit data between devices and routers.

Bluetooth: Short-range communication between devices like headphones, keyboards, and phones.

2. Describe a use for microwaves

Microwave Ovens: Use microwaves to heat food by causing water molecules to absorb the microwaves, the water molecules then vibrate, generating heat through friction.

Satellite Communication: Microwaves transmit signals between ground stations and satellites for TV, internet, and GPS.

3. Describe a use for Gamma rays

Cancer Treatment (Radiotherapy): High-energy gamma rays are used to kill cancer cells and shrink tumors.

Sterilisation of Medical Equipment: Gamma rays effectively sterilise surgical instruments and medical supplies by destroying bacteria, viruses, and other pathogens.

Food Irradiation: Gamma rays kill bacteria, parasites, and other harmful organisms, extending the shelf life of food.