Introduction
Welcome to Knowledge Discovery created by Kerry-Ann Downer. This website was created to increase student engagement, social interaction, and communication skills, as well as provide them with knowledge about light energy.
Did you know that Light is a beam of energy that travels in a wave?
LET'S CONTINUE FOR MORE!!!!
Click on Task
Task
Your task for this lesson are the following:
1. Learn about the light sources.
2. Learn about properties of light.
HAVE FUN WHILE YOU DO SO!
Click on Process
Process
Hello and welcome students!! Before we get started with our lesson, let’s watch and listen to an educational video about light sources. Click on this link to watch the video: https://youtu.be/k5G3b9Jp3T8 “27 Source of light” Duration: 2:07
EVALUATION: Students will be tested on how well they understands the lesson by completing a live worksheet. Tap Finish to complete the marking exercise.
STEPS:
- Go to https://www.liveworksheets.com/td2860451cp and https://www.liveworksheets.com/nj1377289bt to test your knowledge about Light travel, reflection, refraction and rays.
- The goal of this interactive worksheet is to test students knowledge about Light Energy
- Make certain you take notes.
- We can go to the next step once you have completed the activity above.
Click on Evaluation
Evaluation
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Total number of correct answers __________________
Total number of incorrect answers ________________
Outcome of results ____________________________ ( Pass/ fail)
Click on Conclusion
Conclusion
Now that you have finished the lesson, give yourself a pat on the shoulder. You ought to feel pleased of yourself!!! Fantastic work! Here is a quick rundown of everything you have learned so far.
Light is the energy that comes from the sun and travels at a speed of 186,282 miles per second. Although light travels in a straight line, it is described as "waves" that are made up of energy bundles called photons. Light bulbs, flashlights, and the sun are all examples of light sources. Our eyes change visible light energy waves into visible light. Light energy comes in many different forms. Visible light energy is just one of them. Infrared, ultraviolet, radio, and x-ray light energy are examples of unseen forms of light energy, or light energy that we cannot see. Light waves are the source of all light energy.Colour is created by the energy of visible light. Light waves vibrating at different speeds are represented by different colours. Do you know that the majority of light can be created by combining just three colors: red, blue, and green? If an object's pigments absorb all colours, it appears black, whereas if they reflect all colors, it appears white
Light has other properties that make it fun to learn about. Light waves can be reflected and refracted.
What is the definition of reflection?
Reflection is the term used for when light bounces off the surfce of an object. For example, when you gaze in the mirror or see the sky and clouds reflected in a pool of water, you will notice this.The light reflects back at us from the gleaming surface of the mirror glass or water.
What is the definition of refraction?
Refraction is when the light waves are bent as they pass through a clear object. For, example, a pair of eyeglasses' lens helps us see more clearly by bending light rays to help the eye to adjust images for a distance, whether it is close up or far away.
Light waves of various lengths are all reflected in the same way, but they are not all refracted in the same way. When light bounces off prisms, glass, and raindrops, red light waves bend the least and violet light waves bend the most, creating a rainbow effect.
The sun and other stars emit radio waves, sending them through space. To detect them on Earth, aerospace engineers use radio telescopes. These huge disks face the sky to collect and focus wave energy. The largest single-dish radio telescope is at Arecibo, Puerto Rico. The dish is built into karst topography—a natural hollow in the ground—and is 1,000 feet across. As the Earth moves, the disk turns to point at different parts of the sky.
Scientists utilise light energy in a variety of diverse ways. Scientists have discovered how to manipulate light using prisms and magnifying lenses. Light is used by engineers to create medical devices, x-ray machines, telescopes, cameras, computers, and microscopes. Engineers must understand how light energy works in order to produce these innovative items and equipment that benefit people on a daily basis. We'll discover more about light energy and where it can be found all around us today.
Scientists use light's qualities to create a variety of products that help society. Lighting engineers take advantage of natural light to reduce human energy usage, sometimes reflecting sunlight off room surfaces to bring light to locations at a distance from windows. Engineers design lasers that are so powerful that they can penetrate metal. Lasers are used to create holograms, read bar codes and compact disks, and convey communications across fiber-optic cables in industry, medicine, and surgery. Light's properties are also used in the design of medical equipment, cameras, and microscopes.
Scientists use light to create a variety of useful items for our environment. Some examples of things used by scientists to manage light energy are eyeglasses, microscopes, medical equipment, magnifying glasses, prisms, and polarized sunglasses.
Tell a friend or family member what you learned about light energy today, and point out something around you that was created by a scientist to use light energy, such as a lamp, camera lens, reading glasses, television, or computer.
Click on Credits to see References
Credits
References
A to Z School Study with science, (2018) “27 Source of light”
EvaluationForms.org, (2020) Performance Evaluation Process
https://www.evaluationforms.org/performance-evaluation/process/
Regents of the University of Colorado, (2005) The Energy of Light
https://www.teachengineering.org/lessons/view/cub_energy2_lesson03
Stewards.edu, (2012) Light Energy Lesson Plan - St. Edwards University
Teacher Page
Lesson Ojectives
- Cognitive Objective.The student will be able to build on prior understanding of light energy.
- Affective Objective- The student will be able to communicate their understanding of Light Energy to a friend or family member.
- Psychomotor Objective- At the end of the lesson, the student will be able to complete an interactive worksheet.
The lesson objectives that were used to construct this webquest are listed below.
- Explain to a friend or family member that light is a form of energy and that it can be characterized as a wave.
- Describe reflection and refraction of light waves.
- Explain how scientists use light waves