Physics: Optek

1. Reflection

 Plane Mirror

 A _________ is a mirror with a planar reflective surface.

 For light rays striking a plane mirror, the angle of reflection equals the angle of ______

 Image formation by plane mirror:

 If you stand in front of a plane mirror you see your image ________ the mirror. The location of the image can be diagramed knowing that the surface of the mirror reflects light with an angle of reflection equal to the ________.

 Properties of Image:

 It is formed

 behind the mirror

 it is right side up

 having same size as that of object

 Far behind the surface as the object is in front of it.

 We refer to the image as virtual image.

2. _________  A reflecting surface having the form of a portion of a sphere

Ray Diagrams Points:

 One surface of the curved mirror is silvered.

The centre of the sphere is called the _____________

 The geometrical centre of the mirror is called its ______

 The line joining the pole of the mirror and its centre of curvature is called the __________.

 When a parallel beam of light is incident on a spherical mirror, the point where the reflected ray converge on the principal axis is called the __________.

3. Uses of Spherical Mirrors: ___________

 Sunglasses

 Vehicle

 Security

 Magnifying Glass ____________

 Vehicle

 Light Concentration

4. Image Distance

o All virtual images have _________ distances

o All real images have _________ image distances

5.  “If the reflecting surface lies on the inside of the curve, is a __________”

 Rules:

o Rays parallel to the principle axis are reflected towards the __________ of the mirror.

o A ray passing through the _____ of curvature retraces its path

o A ray passing through the principal focus, after reflection is rendered parallel to the ___________.

o A ray of light which strikes the mirror at its pole gets ______ according to the law of reflection.

 Image formation in Concave Mirror:

o CASE 1:

When the object is placed at the center of curvature, the image is of_______________ and is at the center.

o CASE 2:

When the object is placed after the centre of curvature, it is seen that the image is ___________ in shape and lies between the ____________.

o CASE 3

When the object is placed within the focus of the mirror it is seen that image is _____________ in shape and lies ______ the mirror.

o CASE 4:

When the object is between the centre of curvature and focus,it is seen that image is _____________ and lies _______ the centre of curvature.

6.  “If the reflecting surface lies on the outside of the curve, is a “_________”.

 Rules:

o A ray of light traveling parallel the principal axis after reflection from a convex mirror appears to come from its focus ______ the mirror

o A ray of light traveling towards the centre of curvature behind the mirror and is ________ back its own path.

 Image formation in convex Mirror:

o The object is placed anywhere in front of the convex mirror.

o The ray parallel to the principal axis after reflection appears to come from the focus F _______ the mirror.

o Another ray going towards the centre of curvature C behind the mirror gets ________ by the same path.

o The two reflected rays appear to intersect at a point between _____________ the mirror.

o The image appears to be ___________.

o So the image formed by the convex mirror is ________________ with respect to object.