Light-Pre test

Which of the following is true about the incident ray, reflected ray, and normal during reflection?

• a) The incident ray and the reflected ray are parallel to each other.

• b) The normal is always at a 45-degree angle to the surface.

• C) The incident ray and the normal are always perpendicular.

• d) None of these

What is the normal in the context of the laws of reflection?

• a) A line parallel to the reflective surface.

• b) A line perpendicular to the surface at the point of incidence.

• c) A line that indicates the angle of reflection.

What makes objects visible?

• a) the absorption of light by objects

• b) the reflected light from the object

• c) the total internal reflection taking place in an object

Why does a pencil look broken when it is placed in a glass of water?

• a) The refraction of light causes a change in the position of the image.

• b) The light is reflected by the water surface.

• c) The pencil absorbs some light and appears distorted.

• d) The pencil's color causes it to appear broken in water.

Light is a form of ______________________ radiation. 

• a) magnetic radiation

• b) Electric radiation

• c) Electromagnetic radiation

• d) None of these

The angle between the incident ray and the normal is called:

• a) Angle of refraction

• b) Angle of deviation

• c) Angle of reflection

• d) None of these