What is reflection? What is the difference in reflection of light from a paperand a mirror? Name two devices that use reflection in it’s functioning.
Answers
Answer:
When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray which lands upon the surface is said to be reflected off the surface. The ray that bounces back is called the reflected ray. If a perpendicular were to be drawn on a reflecting surface, it would be called normal. The figure below shows the reflection of an incident beam on a plane mirror.
Here, the angle of incidence and angle of reflection are with respect to normal and the reflective surface.
Reflection of Light
Laws of Reflection
The laws of reflection determine the reflection of incident light rays on reflecting surfaces, like mirrors, smooth metal surfaces and clear water. Let’s consider a plane mirror as shown in the figure above. The law of reflection states that
The incident ray, the reflected ray and the normal all lie in the same plane
The angle of incidence = Angle of reflection
2,63,148
Types of Reflection of Light
Different types of reflection of light are briefly discussed below:
Regular reflection is also known as specular reflection
Diffused reflection
Multiple reflection
Regular/ Specular Reflection
Specular Reflection refers to a clear and sharp reflection, like the ones you get in a mirror. A mirror is made of glass which is coated with a uniform layer of a highly reflective material such as powder. This reflective surface reflects almost all the light incident on it uniformly. There is not much variation in the angles of reflections between various points. This means that the haziness and the blurring are almost entirely eliminated.
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