Physics Recap Notes: LIGHT

Physics Recap Notes:Reflection of light

1. What is meant by Reflection of light?
   When a ray of light hits the surface of an object, part of the light is absorbed and part is reflected.
2. What is meant by normal?
   If we draw a line perpendicular to a surface, this line is the normal of the surface.
   
3. What is meant by the incident angle?
   Is the angle between the normal and the incident ray.
   
4. What is meant by the reflection angle?
   Is the angle between the normal and the reflected ray.
   
5. State the reflection law of light?
   1- The incident ray of light, normal, and reflected ray are in the same plane
   2- The reflection angle is equal to the incident angle
   
6. What are the characteristics of an image in a plane mirror?
1. The image has the same size as the object
2. The image distance from mirror is the same as the object distance from mirror
3. The image distance from the object is twice the distance from the mirror to the object
4. The image is virtual and upright
5. The image is laterally inverted 
7. Explain how to draw the image of an object in a plane mirror?
1. Draw a line from the most top point in the object that is perpendicular to mirror
2. Draw a line from the most top point in the object that is makes an angle with the Normal to mirror
3. Draw a line from the lowest point in the object that is perpendicular to mirror

4.       Draw a line from lowest point in the object that is makes an angle with the Normal to mirror