Chapter 11 EM waves

all about EM waves

List the range of waves from highest wavelength to lowest wavelength

gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and radio waves.

Can EM waves travel in a medium?

Nah

What are EM waves speed?

Electromagnetic waves travel at the speed of light, 3×10 power 8 m/s in vacuum.

What colours are in light waves?

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Arrange colours of light waves from highest frequency to lowest frequency

Violet, Indigo, Blue Green, Yellow, Orange, Red

What are some uses of some EM waves?

Electromagnetic waves have various applications, including communication (radio and microwaves), medical imaging (X-rays), and food safety (microwave ovens).

What’s the most harmful EM wave and why?

Gamma rays, because they have high energy and can damage our skin tissues.

Define ionising radiation

Ionising radiation refers to radiation that has enough energy to remove tightly bound electrons from atoms, creating ions. This type of radiation includes alpha particles, beta particles, gamma rays, and X-rays, which can cause cellular damage and increase cancer risk.

Uses of ionising EM waves

include medical imaging, cancer treatment, and sterilization. (any 1)

Lowest frequency wave and its use

Radio waves, used for communication and broadcasting.