10.5 flashcards

Question	Answer
Luminous	Any object or substance that gives off its own light.
Incandescent	Incandescent objects give off light only when hot.
Bioluminescent	Living things that emit light without giving off heat.
Non-luminous	Things that are NOT luminous
Visible spectrum	White light that consists of many different colours
Dispersion	The separation of the colours that make up white light. Each colour is bent differently when it enters or leaves a glass prism.
Electromagnetic radiation	The radiant energy such as radio waves, infrared, visible light, X-rays and gamma rays released by magnetic or electric fields
Electromagnetic spectrum	Complete range of wavelengths of energy radiated as electric and magnetic fields
Radio waves	Low-energy waves that are used to communicate over long distances through radio, television, mobile phones and wi-fi.
Infa-red radiation	This is emitted by all objects and is sensed as heat. It is invisible to humans
Ultraviolet radiation	It is needed by humans to help the body produce vitamin D; however, too much exposure to ultraviolet radiation causes sunburn. Ultraviolet radiation has more energy than visible light.
X-ray	High energy electromagnetic waves that can be transmitted through solids and provide information about their structure
Gamma rays	Emitted by radioactive substances and larger stars, gamma rays have even more energy than X-rays and can cause serious damage to living cells.

Resource summary

	Created by Oyedele Oluwaseun about 5 years ago