LESSON 5.1 - DISCOVERY OF ELECTROMAGNETIC WAVES Flashcards
Who is Euclid of Alexandria?
Euclid of Alexandria was a mathematician who had theories about light.
What did Euclid believe about light?
He believed that light comes from our eyes and travels in straight lines.
What phenomenon did Euclid study regarding light?
He studied how light bounces off surfaces, known as reflection.
Who is Claudius Ptolemy?
Known for his Earth-centered model of the universe, he looked at how light bends (refraction) and how colors appear.
What did James Bradley measure?
He figured out the speed of light using stars, measuring it to be about 299,910,000 meters per second, which is super close to the current accepted value.
What is the Particle Model of light?
This idea says light is made of tiny particles that travel straight.
What was Isaac Newton’s contribution to the understanding of light?
He thought of light as particles, explaining reflection and refraction, but he didn’t fully explain how this force worked.
What did Albert Einstein say about light?
He later said light is made of ‘photons,’ which are particles with energy linked to their frequency.
What is the Wave Model of light?
This perspective describes light as waves, similar to sound or water ripples.
What does the Wave Model predict?
It predicts that light waves can interfere with each other (either amplifying or canceling out).
Who worked on the mathematics of light waves?
Christiaan Huygens worked on the mathematics of light waves, explaining reflection and refraction.
What is an example application of the wave model?
The wave model helps with radio wave technology for communication, while the particle model is key in making solar panels that generate electricity.
Who developed the theory of light as electromagnetic waves?
James Clerk Maxwell developed the theory that light is actually an electromagnetic wave.
What did Heinrich Hertz discover?
He was the first to discover radio waves, showing they travel at the same speed as light and behave like light waves.
What is the summary of light’s nature?
Scientists figured out that light can be seen as both particles and waves, and they discovered that light and radio waves are part of a bigger family of electromagnetic waves.
