# Types of Reflection, Irregular Reflection, Regular Reflection (For CBSE, ICSE, IAS, NET, NRA 2022)

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# Types of Reflection

• Regular Reflection
• Irregular Reflection

## Regular Reflection

• This type of reflection is produced by the plane mirrors with a smooth surface.
• In this case, the image is clear and is very much visible.
• They produced by plane mirrors are always virtual, that is they cannot be collected on a screen.
• In the case of curved mirrors with a smooth surface, we can see the images of reflection either virtually or really.
• The images produced by curved mirrors can be either real (collected on a screen and seen) , or virtual (cannot be collected on a screen, but only seen) .

## Irregular Reflection

• Most natural surfaces are rough on the scale of the wavelength of light, and, as a consequence, parallel incident light rays are reflected in many different directions irregularly, or diffusely, unlike the mirrors.
• So, diffuse reflection helps in seeing the objects and is responsible for the ability to see most illuminated surfaces from any position.
• In both regular and irregular reflections, the laws of reflection are followed.

## Law of Reflection Formula

The law of reflection formula is given as:

Where,

• is the angle of incidence
• is the angle of reflection

## Calculation of Angle of Incidence and Angle of Reflection

The angle of incidence and the angle of reflection are calculated by drawing a normal line which is perpendicular to the reflecting surface.

## Differences between Regular and Irregular Reflection

 S. No. Regular Reflection Irregular Reflection 1 It occurs when all the reflected rays from a given smooth surface are parallel for parallel incident rays. It occurs when for a given set of incident parallel rays, the reflected rays do not remain parallel to each other. 2 This occurs from smooth surfaces like a mirror, silver spoon, etc. This occurs from rough surfaces like wood, table, door, book, etc. 3 The image is formed and seen. It helps to see objects. No images.

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