QUALITY
This wave property of light explains why light spreads or bends when passing through small openings or around obstacles.
DIFFRACTION
Einstein proposed that these energy packets, which make up light, are responsible for ejecting electrons in the photoelectric effect.
PHOTONS
Einstein received the Nobel Prize in Physics for explaining this phenomenon, which classical wave theory could not fully describe.
photoelectric effect
Occurs when multiple waves interact, resulting in changes in amplitude due to the superposition of waves.
INTERFERENCE
■Longer wavelengths but less energy.
RED
When light passes through a prism, it splits into seven colors. What is this process called?
Dispersion
Name the color that bends the least during dispersion.
Red
This scientist proposed that light behaves like waves, similar to water ripples spreading out from a stone.
Christian Huygens
Two waves combine, resulting in higher intensity.
Constructive Interference
■Shorter wavelengths but more energy.
BLUE
In Thomas Young’s experiment, this pattern appeared on the screen when light passed through two slits.
Interference pattern
This term describes the phenomenon where waves combine to create brighter light bands.
constructive interference
It is a wave created by vibrating objects and propagated through a medium
Sound Waves
FACTORS AFFECTING IMPACT SOUNDS
1.The force of the impact.
2.Characteristics of the surface being impacted.
3.Properties of the structure through which vibrations transmit.
4.Features of the radiating surface.
■Einstein’s explanation of the ___________ earned him the 1921 Nobel Prize in Physics.
Photoelectric effect
This scientist’s experiment in 1900 showed that the color of light affects the ejection of electrons from metal surfaces.
Max Planck
What are the Characteristics of Sounds?
Loudness
Pitch
Quality/Timbre
Intensity
Depends on the amplitude of vibrations. The greater the amplitude the louder the sound.
What was the proposed theory of Christian Huygens?
Light as a Wave
What properties of the light state that light reflects off surfaces where the angle of incidence equals the angle of reflection?
Reflection
Depends on the frequency of vibrations. The faster the vibrations, the higher the frequency and so the higher the pitch.
PITCH
This helps us to identify one sound from another
QUALITY/TIMBRE
It is a physical phenomenon where an external force or vibrating system causes another system to vibrate with greater amplitude
Resonance
Light consists of tiny energy packets called ________.
Photons
What properties of light state that light changes speed and direction when passing between different mediums.
Refraction