Brighten your science knowledge with our fun light facts for kids.
Enjoy interesting trivia related to color, the speed of light, optics,
sunlight, ultraviolet light and infrared light. Understand how electromagnetic
radiation works and discover the many fascinating properties of light.
physics, light refers to electromagnetic radiation. The light we normally
talk about in everyday life refers to the visible spectrum (the part of
the electromagnetic spectrum that the human eye can see).
animals can see parts of the spectrum that humans canít. For example, a
large number of insects can see ultraviolet (UV) light.
light can be used to show things the human eye canít see, coming in handy
for forensic scientists.
wavelength of infrared light is too long to be visible to the human eye.
study the properties and behaviors of light in a branch of physics known
Newton observed that a thin beam of sunlight hitting a glass prism on
an angle creates a band of visible colors that includes red, orange,
yellow, green, blue, indigo and violet (ROYGBIV). This occurred because
different colors travel through glass (and other mediums) at different
speeds, causing them to refract at different angles and separate from each
travels very, very fast. The speed of light in a vacuum (an area empty of
matter) is around 186,000 miles per second (300,000 kilometres per
travels slower through different mediums such as glass, water and
air. These mediums are given a refractive index to describe by how much
they slow the movement of light. Glass has a refractive index of 1.5,
meaning that lights travels through it at around 124,000 miles per second
(200,000 kilometres per second). The refractive index of water is 1.3
while the refractive index of air is 1.0003, meaning that air only
slightly slows down light.
takes 1.255 seconds to get from the Earth to the Moon.
can reach a depth of around 80 metres (262 feet) in the ocean.
of the many things Italian scientist Galileo Galilei worked on
was telescopes, producing telescopes with around 30x magnification in some
of his later work. These telescopes helped him discover the four largest
moons orbiting Jupiter (later named the Galilean satellites).
is a process that involves plants using energy from
sunlight to convert carbon dioxide into food.