How image is formed on plane mirror.
1.The characteristic of image in a plane mirror is...
- same size as object
- laterally inverted
- image distance equal to object distance from mirror
- virtual image
2. Law of reflection is obeyed here that is....
- angle of incidence equal to angle of reflection
- the incidence ray, the reflected ray and the normal all lie on the same plane.
3. How to determine the angle of incidence and angle of reflection.
1. Consider the diagram below. Which one of the angles (A, B, C, or D) is the angle of incidence? Which one of the angles is the angle of reflection?
2. A ray of light is incident towards a plane mirror at an angle of 30-degrees with the mirror surface. What will be the angle of reflection?
3. Perhaps you have observed the image of the sun in the windows of distant buildings near the time that the sun is rising or setting. However, the image of the sun is not seen in the windows of distant building during midday. Use the diagram below to explain, drawing appropriate light rays on the diagram.
4. A ray of light is approaching a set of three mirrors as shown in the diagram. The light ray is approaching the first mirror at an angle of 45-degrees with the mirror surface. Trace the path of the light ray as it bounces off the mirror. Continue tracing the ray until it finally exits from the mirror system. How many times will the ray reflect before it finally exits?
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