Nature of light Flashcards
what year was the kerosene lamp invented
19th century
Who thought to represent light as thin rectiliniear threads
The mathematician, Euclide
Who formulated the laws of reflection and refraction?
Al-Haan Ibn Al-Haytham
Who used two hills in Tuscany to measure the speed of light but did not succeed?
Galileo
Which dutch mathematician and astronomer supported the theory that light was a wave?
Christiaan Huygens
Who believed that light had finite speed, and that its speed was not infinity?
Romer
even after the discovery of diffraction and interference, they remained partisans of the particle theory of light.
Newtonians
A key discovery of Maxwell..?
That light is an electromagnetic wave.
The photoelectric effect proves that the ___?
it proves the particulate nature of light/ talks about photons and quanta of light
These are particles without mass whose energy depends on the frequency of the associated wave
photons
put forward by Einstein in 1905, where he spoke about light have photons
in 1666, Newton’s experiments with a glass prism led to the discovery of __?
the dispersion of light
Which invisible light was first discovered?
Infrared light was discovered by William Hershell
who labelled the rays they discovered ‘X’ because they did not know what they were
Rontgen
Who has a shorter wavelength, Gamma rays or X-rays?
Gamma rays have a shorter wavelength
What type of waves are associated with the military device giving rise to a cooking method commonly used today?
microwaves
