Reflection of Light Concepts

The video tutorial explains the concept of reflection, focusing on two types: regular and irregular reflection. Regular reflection occurs on smooth surfaces like mirrors, where light rays remain parallel, allowing us to see clear images. Irregular reflection happens on rough surfaces, causing light to scatter in different directions, which is why we can't see reflections on walls or paper. The tutorial also covers the law of reflection, stating that the angle of incidence equals the angle of reflection, even on rough surfaces. Reflection is crucial for visibility, enabling us to see objects not directly in the path of light.

Why can't we see our reflection on walls or pieces of paper?

• Because they do not reflect light

• Because they absorb all light

• Because their surfaces are not smooth

• Because they are transparent

What type of surface is required for regular reflection?

• Opaque and thick

• Rough and uneven

• Transparent and thin

• Smooth and shiny

What happens to light rays in regular reflection?

• They scatter in all directions

• They get absorbed

• They pass through the surface

• They remain parallel after reflection

Which of the following is an example of a surface where regular reflection occurs?

• A mirror

• A wooden table

• A brick wall

• A piece of paper

What is another name for irregular reflection?

• Specular reflection

• Diffuse reflection

• Direct reflection

• Regular reflection

Why do we need a microscope to see the roughness of some surfaces?

• Because the roughness is very small

• Because the surface is too shiny

• Because the surface is transparent

• Because the surface is too dark

What happens to light rays in diffuse reflection?

• They pass through the surface

• They scatter in different directions

• They get absorbed

• They remain parallel

How does diffuse reflection help us in our daily lives?

• It allows us to see objects that are not in the direct path of light

• It prevents light from entering rooms

• It makes surfaces appear shiny

• It helps in the formation of shadows

What is the main difference between regular and diffuse reflection?

• Regular reflection occurs on rough surfaces, while diffuse reflection occurs on smooth surfaces

• Regular reflection absorbs light, while diffuse reflection reflects light

• Regular reflection occurs on smooth surfaces, while diffuse reflection occurs on rough surfaces

• Regular reflection scatters light, while diffuse reflection keeps light parallel

What allows us to see reflections in mirrors?

• Transmission of light

• Diffuse reflection

• Absorption of light

• Regular reflection