Light Introduction PDF
Document Details
Uploaded by Deleted User
2021
DE VERA, Villa-Michelle P.
Tags
Summary
These slides provide an introduction to the topic of light, covering various aspects such as the particle and wave nature of light, experiments, theories, and concepts. The slides are part of distance learning materials for Science 10.
Full Transcript
DE VERA, Villa-Michelle P. January 2021 Slides for Science 10 Distance Learning LIGHT INTRODUCTION LIGHT LIGHT SOURCE IS LIGHT A WAVE OR A PARTICLE? “PARTICLE” -Isaac Newton, 1672 (Corpuscular Theory of Light) Newton thought that light was a motion of particles (light corpuscles) in straight...
DE VERA, Villa-Michelle P. January 2021 Slides for Science 10 Distance Learning LIGHT INTRODUCTION LIGHT LIGHT SOURCE IS LIGHT A WAVE OR A PARTICLE? “PARTICLE” -Isaac Newton, 1672 (Corpuscular Theory of Light) Newton thought that light was a motion of particles (light corpuscles) in straight lines. NEWTON’S EXPERIMENT “WAVE” -Christiaan Huygens, 1678 (Huygens’ Principle) C. Huygens succeeded in explaining almost all of the properties of light propagation known at that time, assuming light was a wave traveling in an unknown medium. YOUNG’S DOUBLE SLIT EXPERIMENT 1801 Light is a wave PARTICLE and WAVE in DOUBLE-SLIT MAXWELL’S EQUATIONS 1865 Light is an ‘electromagnetic’ wave. A wave. PLANCK’S QUANTUM THEORY 1900 Planck postulated that the energy of light is proportional to the frequency, and the constant that relates them is known as Planck's constant (h). His work led to Albert Einstein determining that light exists in discrete quanta of energy, or photons. EINSTEIN’S PHOTOELECTRIC EFFECT 1905 Light is a particle When light shines on a metal, electrons can be ejected from the surface of the metal in a phenomenon known as the photoelectric effect. This process is also often referred to as photoemission, and the electrons that are ejected from the metal are called photoelectrons. In terms of their behavior and their properties, photoelectrons are no different from other electrons. The prefix, photo-, simply tells us that the electrons have been ejected from a metal surface by incident light. HOW DO WE SEE THINGS? EFFECTS OF MATERIALS ON LIGHT TRANSLUCENT OPAQUE TRANSPARENT HOW SHADOWS ARE FORMED REFLECTION REFLECTION REFRACTION IF LIGHT SLOWS DOWN, IT BENDS/REFRACTS TOWARDS THE NORMAL LINE THE SLOWER THE LIGHT TRAVELS IN A MEDIUM, THE MORE IT BENDS IN IT. DISPERSION The separation of visible light into its different colors TOTAL INTERNAL REFLECTION When the light is reflected completely at a boundary between two medium. DIAMONDS TOTAL INTERNAL REFLECTION When the light is reflected completely at a boundary between two medium. FIBER OPTICS DIFFRACTION Light spreads out after passing through an opening or edge INTERFERENCE Light can superimpose Constructive Destructive POLARIZATION Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. HOW POLARIZER WORKS
