Science of Light By Connor McKinlay Y5/6

Light Facts Optics is the study of light Light energy is always moving and can therefore not be stored Space is dark because light is only visible when it has an object of which to bounce off

Speed of light Light travels very very fast indeed Its speed is around 186,000 miles per second / 200,000 kilometers per second – measured in a vacuum It takes 1.225 seconds to get from the earth to the moon The sunlight that we see here on Earth actually left the Sun 10 minutes before Sunlight can reach a depth around 80 meters in the ocean Air only slightly slows down light

Is light an energy? Light is a type of electromagnetic energy Light is also called electromagnetic radiation when speaking of light other than visible light. Of all the forms of radiation and light on the electromagnetic spectrum, humans can only visibly see a very small amount of light UV lights are often used by forensic scientists to see details that are not seen by the naked eye

What is the colour of light? The light we normally talk about in everyday life refers to the visible spectrum – the bit that the human eye can see White light is a combination of all the colours in the colour spectrum. It has all the colours of the rainbow On one end of the spectrum is red light with the longest wave length Blue or violet has the shortest wavelength

What type of material can light travel through Water Glass Crystal Clear Plastic Such materials are called ‘Transparent’

Thank you Wise Ones