Wave Nature of Light: Light Intensity

The video tutorial explains the concept of light intensity and its relationship with distance. Through a simple experiment using a torch and a wall, it demonstrates that light intensity decreases as the distance from the light source increases, establishing an inverse relationship. The tutorial concludes by defining light intensity as the quantity of light falling perpendicularly on a unit area of a surface in one second.

What is the primary focus of the initial discussion in the video?

• The amount of light falling on a surface

• The source of light

• The color of light

• The speed of light

In the experiment, what happens to the light intensity as the distance from the wall increases?

• It fluctuates

• It decreases

• It increases

• It remains the same

What tool is used in the experiment to demonstrate the concept of light intensity?

• A torch

• A laser pointer

• A flashlight

• A lamp

How is the relationship between light intensity and distance described?

• No relationship

• Direct relationship

• Cyclic relationship

• Inverse relationship

How is light intensity defined in the conclusion?

• The speed of light in a vacuum

• The color of light emitted by a source

• The quantity of light falling perpendicular to a unit area of a surface in one second

• The distance light travels in one second