A scientist was studying the colors of stars. One star appeared more red than the scientist expected it to be. After consulting the chart below, the scientist made a true claim supported by evidence in the table and knowledge about the Doppler Effect. The Visible Light Spectrum Wavelength (nm) 625 - 740 Color Red Orange 590 - 625 565 - 590 520 - 565 500 - 520 435 - 500 380 - 435 Yellow Green Cyan Blue Violet What was the scientist's conclusion? (DOK 3) A. The star is moving rapidly away from Earth. The apparent frequency of the light of the star is higher than its actual frequency due to the Doppler Effect. O B. The star is moving rapidly towards Earth. The apparent frequency of the light of the star is lower than its actual frequency due to the Doppler Effect. O C. The star is moving rapidly towards Earth. The apparent frequency of the light of the star is higher than its actual frequency due to the Doppler Effect. D. The star is moving rapidly away from Earth. The apparent frequency of the light of the star is lower than its actual frequency due to the Doppler Effect.
Particle Theory of Light
The particle theory of light was the proposal made by Newton in 1704 in his treatise Opticks. This is the most basic light theory, in which light is thought to be made up of microscopic particles known as "corpuscles" and that's why this particle theory of light is also named as Corpuscular theory of light.
Stopping Potential
In an experiment conducted by Heinrich Hertz, an apparatus was made where the incident light was made to fall on the metallic plate, it was discovered that metals emit electrons. The surface electrons are bound to metals with a minimum amount of energy and some of the incident photos enter the surface, they undergo collision with the atoms of the metal, they get absorbed and emit energy to an election, making it photoelectron, where the collision between the photons and electrons ejects the electrons out of the metal and with a negatively charged electron, causes photocurrent and when this current passes it creates an electric field where there is a potential difference at the output due to the anode and cathode of the electrode of the apparatus. This study involves the theory of Quantum physics and electromagnetism involving electromagnetic radiation and electromagnetic wave theory.
Quantization of Charges
An electron is a negatively charged subatomic particle either attached to an an atom or sticks to the nucleus of the atom. Electrons exert the negative charge that tries to balance the positive charge of the nucleus.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
