Question

1.   List four characteristics of the images formed by plane mirrors. (CBSE 2015)

2.   Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray which is directed parallel to the principal axis of a convex mirror. Mark on it the angle of incident and the angle of reflection (CBSE 2014)

3.   A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror.

         (a) Write the type of mirror.

         (b) Find the distance of the image from the object.

         (c) What is the focal length of the mirror?

         (d) Draw the ray diagram to show the image formation in this case. (CBSE 2014)

4.   State the laws of refraction of light. If the speed of light in vacuum is 3X108 ms-1, find the speed of light in a medium of absolute refractive index 1.5. (CBSE 2014)
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Answer 1

Answer:

Characteristics of the image formed by plane mirror

1. image is virtual and erect

2. It is of same size as the object

3. It has same distance as the object to the mirror

4. It is laterally reversed

5. the minimum length of the mirror required to form full size image of the object is the half size of the object.

Answer 2

Answer:

>PLANE MIRRORS FROM VITUAL IMAGES.

>PLANE MIRRORS FORM ERECT IMAIMAGES

>IMAGE IS LATERALLY INVERTED.

>IMAGE FOEMED IS OF THE SAME SIZE AS THE OBJECT.