Total internal reflection means that all the light propagating through a medium is reflected when it reaches its boundary.
Dictionary category: Question
What is trichromacy?
Trichromacy refers to the idea that humans are capable of colour vision as a result of the sensitivity of our eyes to three regions of colour within the visible spectrum.
What is white light?
White light is the name for light containing all the wavelengths of the visible spectrum.
What kind of radiation does the Sun emit?
The sun emits electromagnetic radiation.
What kind of solar radiation can we see?
Our eyes are tuned to visible light – the visible part of the electromagnetic spectrum.
What natural source radiates light at all wavelengths of the electromagnetic spectrum?
The Sun radiates light at all wavelengths of the electromagnetic spectrum.
What range of wavelengths correspond with green?
The range of wavelengths that correspond with green is between 570 – 495 nanometres.
What speed does a light wave travel at in a vacuum?
A light wave in a vacuum travels at 300,000 kilometres (km) per second! Or to be exact, 299,792 km/sec.
What type of electromagnetic radiation has the highest frequency?
Gamma rays have a higher frequency than any other type of electromagnetic radiation.
What type of electromagnetic radiation has the shortest wavelengths?
Gamma rays have the shortest wavelengths of any type of radiation within the electromagnetic spectrum.
What unit is used to measure the frequency of visible light?
The unit used to measure the frequency of light is the hertz.
The frequency of visible light corresponds to a band of frequencies in the vicinity of 430–770 terahertz (THz)! There are a trillion (1,000,000,000,000) terahertz in a hertz!
What unit is used to measure wavelength within the visible spectrum?
The unit used to measure the wavelengths of visible light is the nanometre.
What unit of measurement is used to measure the frequency of electromagnetic waves?
The hertz is used to measure the frequency of electromagnetic waves. Different prefixes denoting subdivisions are used to aid measurement eg. kilohertz (1,000 cycles/sec), megahertz ( 1,000,000 cycles/sec), gigahertz (1,000,000,000 cycles/sec) and terahertz (1,000,000,000,000 cycles/sec).
What units are used to measure the wavelength of electromagnetic waves?
The unit used to measure wavelength is the metre. Because the size of electromagnetic waves varies, different prefixes are used to aid measurement. Here are six examples: kilometre, centimetre, millimetre, micrometre, nanometre and picometre.
What units are used to measure the wavelength of radio waves?
Millimetres, centimetres, metres and kilometres are all used to measure the wavelengths of radio waves.
When is the best time to see a rainbow?
When light strikes a surface, is the angle of incidence always the same as the angle of reflection?
Yes! The angle of incidence of a ray of light as it strikes any point on a surface is always the same as the angle of reflection.
When white light strikes an object, what determines the colour an observer sees?
When white light strikes an object, its colour is determined by which wavelengths of light are absorbed and which wavelengths are reflected towards the observer.
Where are you most likely to see spectral colours on a rainy day?
Where is red on a primary rainbow?
Red is always on the outside edge of a primary rainbow.