electromagnetic spectrum Flashcards
Visible light spectrum
The segment of the electromagnetic spectrum that the human eye can view.
Visible light
The range of wavelengths
Who discovered the electromagnetic spectrum
Issac Newton
How was the electromagnetic spectrum discovered
Isaac Newton passed a narrow beam of light through a glass prism. As the light exited the prism, Newton could see the colours of the rainbow.
Colours of the electromagnetic spectrum
Red Orange Yellow Green Blue Indigo Violet
Dispersion
The spliting of white light into colours that make up white light
Dispersion
The splitting of white light into colours that make up white light
Each colour has…
It’s own wavelength
How are different wavelengths slowed
Each wavelength is slowed by glass
What happens when the amount of refraction increases
The wavelength decreases
Examples of short wavelengths of light
Blue and Violet
Examples of light with longer wavelengths
Red and orange
How are rainbows formed
Rainbows are formed because rain droplets act as prisms.
The primary colours of the light spectrum
Red
Green
Blue
Why are red green and blue called primary colours
The three colours can be mixed to produce white light
Secondary colours of light spectrum
Yellow
Magenta
Cyan
Red+Green(light)
Yrllow(light)
Red+blue(light)
Magenta(light)
Green + blue(light)
Cyan(light)
Cyan+red(light)
White light
What are cyan and red light called
Complementary colours of light
What happens when white light falls on an opaque object
The object absorbs some of the light and reflects the rest of the light
What is the colour of the object determined by
The colour that the object appears is determined by the colour that is reflected
What colour do transparent objects appear as
Transparent objects appear in the colour that they transmit.
