Concave Mirrors

The concave mirror is the inside of the spherical surface is the reflecting surface.
The characteristic of concave mirror to collect of rays or CONVERGEN
The cut point of focusing reflected rays mentioned FOCUS LENGTH
The parts of concave mirror

 

Explainations of the above figure

C   =  center of mirror curve or radius of curvature

F   =the mirror focal point or focal length

V   = the mirror vertex

FV  = the distance of mirror focal length 

CV =The mirror radius

The principle rays of concave mirror

Reflection of Light in a Pane Mirror and the number of the image formed

Formation of virtual image by a plane mirror

 

 1. Good reflector of light 
     a. Light ray does not actually pass through the mirror (behind the mirror).
     b. It only appears to an observer as through the ray comes behind the mirror
2. The image is a virtual image

     a. Virtual image cannot be projected or focused on to a screen
     b. Image formed behind the mirror

Physics assignment for grade 8

Answer the question below briefly and correctly!

1. An object is placed at the distance of 10 cm in front of a plane mirror. Then the mirror is move 3 cm a far closer to object.Determine:
a. The distance between an object with its image, before moved
b. The distance between an object with its image, after moved
c. The distance between the first image with the second image

2. Two plane mirrors are pinched together to form an angle of 45 degree. Determine the number of the image formed by both mirrors.

3. Two plane mirrors are pinched together to form certain an angle . If the number of image that happened is 11 image,determine the number of the angle by bothmirrors.

4. Sketch-ray diagram and determine the image nature/property  formed  by a plane mirror of an object below!










 

5.      Diagram as follows shown image from o’clock in a plane mirror. What time which shown by the o’clock?