Light and Vision: Exploring Luminous and Non-Luminous Objects

The video tutorial explains how we see objects around us, emphasizing the role of light. It distinguishes between luminous objects, which emit their own light, and non-luminous objects, which do not. The tutorial further explains that we see non-luminous objects through the reflection of light. It also covers how images are formed in mirrors due to reflection, using the human body as an example. The tutorial aims to provide an intuitive understanding of these concepts, with more detailed learning to follow in higher grades.

What is essential for us to see objects around us?

• Sound

• Eyes

• Light

• Darkness

Which of the following is a luminous object?

• Moon

• Sun

• Chair

• Table

What do we call objects that do not emit their own light?

• Transparent

• Reflective

• Non-luminous

• Luminous

How are we able to see non-luminous objects?

• Through their own light

• By reflection of light

• By absorbing light

• By emitting sound

What happens when light strikes a smooth surface?

• It gets absorbed

• It disappears

• It changes color

• It reflects

What is the process called when light bounces off a surface?

• Diffusion

• Absorption

• Reflection

• Refraction

What is the role of a mirror in seeing our image?

• It emits light

• It reflects light

• It refracts light

• It absorbs light

Is the human body a luminous or non-luminous object?

• Transparent

• Reflective

• Non-luminous

• Luminous

Why can't we see images in the dark?

• Because there is no light to reflect

• Because the mirror absorbs light

• Because the light is too bright

• Because the image is too faint

What is necessary for the formation of an image in a mirror?

• Emission of light

• Diffusion of light

• Reflection of light

• Absorption of light