When all parallel rays reflected from a rough or uneven surface are not parallel, this reflection is called:
Diffused reflection
Diffused reflection is correct.
On a rough or uneven surface, the normal at each tiny part of the surface points in a different direction. Each ray still obeys the laws of reflection, but because the normals differ, parallel incident rays leave in different directions.
This scattering is called diffused (irregular) reflection. It lets us see objects such as paper or a wall from any side.
Regular reflection happens on smooth surfaces like a plane mirror, where parallel rays stay parallel after reflection.
Important Questions from Refraction and Reflection
A convex lens of focal length f will form a magnified real image of an object, if the object is placed.
A ray of light travelling in the direction \(\frac{1}{2} (\hat i + \sqrt 3 \hat j)\) is incident on a plane mirror. After reflection it travels along the direction \(\frac{1}{2} (\hat i - \sqrt 3 \hat j)\) The angle of incidence is:
Twinkling of stars is due to atmospheric
An optical fibre has a core material of refractive index of 1.55 and cladding material of refractive index of 1.50. The numerical aperture of the fibre is
- The refracting angle of a prism is $A$. The refractive index of the material of the prism is $\frac{1+\cos A}{\sin A}$. The angle of minimum deviation is:
