Cette leçon contient 28 diapositives, avec diapositives de texte et 1 vidéo.
Éléments de cette leçon
Reflection
6.4 + 6.5
Slide 1 - Diapositive
This lesson
Intro reflection
Plane mirror
Virtual Vs real image
Law of reflection
Slide 2 - Diapositive
Goals
Explain why the image in a mirror is reversed
Describe what is meant by an image
Explain what is meant by a real and a virtual image
Define the law of reflection
Slide 3 - Diapositive
Reflection
What comes to mind?
Slide 4 - Diapositive
Slide 5 - Diapositive
Reflection
Definition of Reflection
When a light ray is obstructed by any solid surface it will reflect back from the surface, as it cannot pass through the surface.
Light ray will be reflected with the same angle with which it is falling on the surface.
Slide 6 - Diapositive
Slide 7 - Diapositive
Slide 8 - Diapositive
Ray diagram
Slide 9 - Diapositive
6.4
Plane mirror
Image — Virtual image - real image
Ray diagram
Types of reflection
6.5
The law of reflection
Slide 10 - Diapositive
Plane mirror
A flat mirror
Slide 11 - Diapositive
Plane mirror
A plane mirror is a smooth or highly polished surface that reflects the light or wave for the formation of an image. It is a flat, polished, and reflective surface that produces a virtual image of the real object.
Slide 12 - Diapositive
Images in plane mirrors
plane mirrors produce images with a number of distinguishable characteristics. Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.
Slide 13 - Diapositive
Why the image in plane mirror is laterally reversed
The light rays which come from the object get reflected from the plane mirror and reaches our eyes. At this point of time our brain feels that the reflected ray is coming from inside the mirror. This is the reason why the object seems to be laterally inverted.
Slide 14 - Diapositive
Plane Mirror demonstration
Slide 15 - Diapositive
Slide 16 - Diapositive
Lateral inversion
Slide 17 - Diapositive
Slide 18 - Diapositive
Image
Slide 19 - Diapositive
Image
Virtual image
Real image
Slide 20 - Diapositive
Slide 21 - Vidéo
Real vs virtual image
Virtual image — projected by the brain (intangible)
Real image — light reflected on a tangible object
Slide 22 - Diapositive
6.4
Plane mirror
Image — Virtual image - real image
Ray diagram
Types of reflection
6.5
The law of reflection
Slide 23 - Diapositive
The law of reflection
Slide 24 - Diapositive
Phet simulation
Search for: Phet bending Light
Use the book and the simulation together to define the law of reflection — write down your definition
