LIGHT

Which sense is one of the most important senses?
1. hearing
2. sight
3. speech
4. all the above
What helps us to see objects?
1. light
2. eyes
3. both the above
4. none of the above
What changes the direction of light that falls on it?
1. screen
2. sight
3. light
4. mirror
The ray that comes back from the surface after reflection is known as the
1. incident ray
2. reflected ray
3. normal
4. all the above
The light ray, which strikes any surface is called the
1. incident ray
2. reflected ray
3. normal
4. all the above
What light is made up of several rays?
1. beam
2. narrow beam
3. several beams
4. all the above
A line making 90 degrees to the line representing the mirror at the point where the incident ray strikes the mirror is known as the
1. incident ray
2. reflected ray
3. normal
4. all the above
The angle between the normal and reflected ray is called the
1. angle of incidence
2. angle of reflection
3. normal
4. all the above
The angle between the normal and incident ray is called the
1. angle of incidence
2. angle of reflection
3. normal
4. all the above
What are valid at each point of the surface?
1. laws of incidence
2. laws of refraction
3. laws of reflection
4. all the above