20 Questions
Which color has the shortest wavelength and highest frequency?
Violet
What color is reflected when all other colors are absorbed?
Orange
What process results in the separation of light into its band of colors?
Dispersion
Which material is commonly used to disperse sunlight to create a solar spectrum?
Glass
What is the color that all the other colors are absorbed and none are reflected?
Black
How does the corpuscular or particle theory of light describe the nature of light?
Light consists of corpuscles that shoot out like tiny bullets
Which theory proposed that light is a train of waves?
Wave theory by Christian Huygens
Who confirmed the electromagnetic wave theory of light?
Heinrich Hertz
What is the Photoelectric Effect related to?
Quantum theory of light
What is the main focus of the Double Slit Experiment by Thomas Young?
Interference (interaction) of light
Who proposed the Electromagnetic Wave Theory?
James Clerk Maxwell
How does the wave theory of light describe the nature of light?
Light consists of waves moving around corners
What did Heinrich Hertz confirm regarding light and other electrically generated waves?
They are of the same nature except they differ in wavelength and frequency
According to Quantum Theory, how is light energy radiated?
In discrete packets or bundles called photons
What dual characteristics are attributed to light based on the conclusions from scientific investigations?
Wave and particle characteristics
What is the SI unit for illuminance?
Lux (lx)
Which of the following is a source of light classified as an artificial source?
Light bulb
What is the science of measuring light based on its perceived brightness to the human eye called?
Photometry
Why does a red rose appear red to our eyes?
It absorbs all colors except red
Which type of materials readily transmit light?
Transparent
Study Notes
Light Properties
- Violet color has the shortest wavelength and highest frequency.
- Black color is reflected when all other colors are absorbed.
Light Dispersion
- The process of separating light into its band of colors is called dispersion.
- Prisms are commonly used to disperse sunlight to create a solar spectrum.
Light Theories
- The corpuscular or particle theory of light describes light as a stream of particles.
- The wave theory of light describes light as a train of waves.
- Christiaan Huygens proposed the wave theory of light.
- James Clerk Maxwell confirmed the electromagnetic wave theory of light.
- Heinrich Hertz confirmed that light and other electrically generated waves are electromagnetic waves.
Light Phenomena
- The Photoelectric Effect is related to the energy of light.
- The Double Slit Experiment by Thomas Young focuses on the wave nature of light.
- According to Quantum Theory, light energy is radiated in discrete packets called photons.
Light Characteristics
- Light has dual characteristics of wave and particle based on scientific investigations.
Light Measurement
- The SI unit for illuminance is lux (lx).
- The science of measuring light based on its perceived brightness to the human eye is called photometry.
Light Sources
- Artificial sources of light include electric lamps and LEDs.
Light and Matter
- A red rose appears red to our eyes because it reflects red light and absorbs other colors.
- Transparent materials readily transmit light.
Test your knowledge on the Double Slit Experiment by Thomas Young, including the interference of light and the wave nature of light. Explore concepts related to Electromagnetic Wave Theory proposed by James Clerk Maxwell, confirmed by Heinrich Hertz, and the Photoelectric Effect.
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