Light is Energy!! Mrs. Wolfe. Light is created when electrons jump and release energy. That makes sense, because when electrons jump, they are using kinetic.

Slides:



Advertisements
Similar presentations
Electromagnetic Waves
Advertisements

Waves are an important part of the Earth, and not just in the water.
Waves Objective: I will understand the difference between mechanical waves and electromagnetic waves.
The Electromagnetic Spectrum. Behavior of Light All light travels at the same speed 1.Behaves as a particle (photon) 2.Behaves as a wave: travels through.
Waves Openers Mrs. V Science A. Crest, B. Wavelength, C. Trough, D. Amplitude
Light WavesSound WavesWave FeaturesComparisonsSeeing Waves
Waves….. What is a Wave? A Wave is a disturbance that carries energy through a medium or empty space. A Medium is a substance such as a solid, liquid,
Electromagnetic Waves. Electromagnetic wave is a wave that can travel through empty space or through matter and is produced by charged particles that.
Characteristics of Waves SI. What is a wave? A disturbance through a medium as energy is transmitted through that medium Energy is the ability to do work,
The Nature of Energy An unbalanced force must be applied to an object to change its motion. Work is the force over a distance. Energy is the ability to.
Waves Transferring Energy. Waves: traveling disturbance that carries energy from one place to another Waves travel through water, but they do not carry.
Wave Basics Unit 9 – Lecture 1.
Energy in Waves. A Wave is… Any disturbance that transmits energy through matter or space. Energy in Waves.
Warm Up 10/21 Where can electrons be found in an atom? What is their electric charge?
Electromagnetic Spectra Review Game. When do electrons emit light? Moving from higher to lower energy levels.
12.6 Light and Atomic Spectra
Waves. Deep Impact video snippet Notice the ripple formed when the comet hits the ocean How do you think the energy of the impact reached the land and.
WAVES AS 2.3: Demonstrate an understanding of wave phenomenon.
Waves – from GCSE What you need to know before you move into AS waves.
Light & Waves Mrs. Wolfe. Recall that Light is Defined by Wavelength The Electromagnetic Spectrum Where does light come from? Electrons jumping Space.
Atomic Emission Spectra
Lesson: Electcromagnetic Spectrum (EMS)
Essential Question: How does data collected provide evidence that the amount of energy a wave carries determines the properties of a wave?
“Physics and the Quantum Mechanical Model” Read pg. 138 p. 1
Electromagnetic Waves 5.1 The Electromagnetic Spectrum.
Chapter 9.1 Notes Electromagnetic Waves Part 1. A changing electric field can produce a changing Magnetic Field.Magnetic Field. A changing magnetic field.
Characteristics of Waves
The Bohr Model of the Atom: Bohr’s major idea was that the energy of the atom was quantized, and that the amount of energy in the atom was related to the.
Electron As a Particle and Wave Electrons get excited when energy is absorbed by using heat or electrical energy Electrons get excited when energy is absorbed.
Waves and Wave Properties. A wave is a disturbance that carries energy from place to place. A wave does NOT carry matter with it! It just moves the matter.
Sound waves transfer energy through vibrations. Sound Produced by vibrations Mechanical waves Vibrate particles Medium affects sound waves. (p. 42) Temperature.
What are Waves? Waves are an important part of the Earth, and they’re not just in the water!
WAVES.
Starter What does ocean waves, sound, and light have in common? List three facts about each topic tht you already know.
Oct 30  Projects due tomorrow!  QOD- How are frequency and wavelength related?  Today: 17.1 – 17.2 notes.
Waves Unit 1: Lessons 1-2. What are waves? A wave is a disturbance that transfers energy from one place to another A medium is the material through which.
Define “wave” Explain why there is no sound in space Define “period”
Starter: Complete the ray diagrams correctly.
The Electromagnetic Spectrum Part 1
Title: Waves 04 September September 2018
Intro to Light: Electromagnetic Waves Standard: Describe the properties and uses of forms of electromagnetic radiation from radio frequencies through gamma.
Electromagnetic spectrum
ARE ALMOST ALMOST ALWAYS ALWAYS NOT RIGHT
WAVES AND THE ELECTROMAGNETIC SPECTRUM
Light and the Atomic Spectra
P1 Topic 2: The Electromagnetic Spectrum
NEW MODULE: WAVES.
25.1 The Electromagnetic Spectrum
P. Sci. Unit 5 Waves Chapter 17.
Brain Pop
Waves Wave properties.
Essential Question: What are the types and properties of waves?
A vibration or disturbance that transfers energy.
Waves and Wave Properties
Waves and Electromagnetic Radiation
Waves and Wave Properties
Waves and Wave Properties
P1 Topic 2: The Electromagnetic Spectrum
Electromagnetic Spectrum
What is a wave? A periodic disturbance in a solid, liquid, or gas as energy is transmitted through a medium What is a medium? A physical environment in.
Physical Science: Chapter 15
Electromagnetic Radiation
Waves & Sound Unit 6.
P1 Topic 2: The Electromagnetic Spectrum
Light Light is a form of energy Energy has the ability to do work
Waves I. Characteristics of Waves Waves Transverse waves
Electromagnetic Spectrum
Quantum Physics – Photons Mr Nesbo
Review of waves.
Waves Waves transfer energy. Example – light and sound waves. Wavelength(λ) – Distance between two crest, measured in meters. Frequency (f) – the number.
Presentation transcript:

Light is Energy!! Mrs. Wolfe

Light is created when electrons jump and release energy. That makes sense, because when electrons jump, they are using kinetic energy….energy of MOTION! This energy is LIGHT! So Light energy MOVES!

Light Energy Moves in Waves! What is a wave? Let’s take a closer look at a wave!

Waves have Parts

Two Types of Waves Transverse Demo: Stadium wave Particles move up and down Longitudinal/Compressional Demo: Slinky Particles move side-to-side

Light is a Transverse Wave What type of wave is an ocean wave?

How does the wavelength change the wave? hysics/2000/waves_particle s/index.htmlhttp:// hysics/2000/waves_particle s/index.html Different wavelengths have different names. List them from LONGEST wavelength to SHORTEST wavelength. ELECTROMAGNETIC Spectrum!

The Electromagnetic Spectrum

If the wavelength is LONGER, fewer waves hit you per second. If the wavelength is SHORTER, more waves hit you per second. This is called FREQUENCY. Frequency is measured in Hertz (Hz). How are frequency and wavelength related? MINI-LAB!

Time for a mini-lab! Go to hysics/2000/waves_particle s/lightspeed-1.html hysics/2000/waves_particle s/lightspeed-1.html How does wavelength affect frequency and the speed of a wave?

Which wave has a higher frequency? Longer wavelength?

Recall, S= D/T Speed =Wavelength x Frequency A wave has a wavelength of 2 m and a frequency of 6 Hz. Calculate the speed of the wave.

Practice Problem…. The wavelength of an ocean wave is 20 feet. You see two waves go by in 10 seconds. What is the speed of the wave when it hits you? (.3048 meters per foot) Wavelength: 20 ft. x.3048 m = m 1 ft. Frequency: 2 waves/10 seconds =.2 waves per second x.2 = 1.2 m/s

Frequency & Energy Draw a high frequency wave. Every time a wave hits you, it uses some energy. Would a high frequency wave have high or low energy? Which wave has the HIGHEST Energy?

Think back to Radioactivity! Gamma radioactive substances emit LIGHT. Think about the FREQUENCY of a gamma wave. Is this high or low energy? Why would a gamma ray hurt ? What does this energy do to your electrons?

Take Home Messages Two types of waves: Transverse & Longitudinal Light travels as a transverse wave. The type of light is defined by its wavelength. Wavelength, Frequency, Energy, and Speed are all related. Be able to draw a wave and label its parts. Be able to calculate wavelength, frequency, & speed