Light: Properties and Types

Definition: Light is a form of electromagnetic radiation that is visible to the human eye.
Properties:
- Has both wave-like and particle-like properties (dual nature)
- Travels at a speed of approximately 299,792,458 meters per second (m/s) in a vacuum
- Can be reflected, refracted, absorbed, and transmitted by materials
Types of Light:
- Visible Light: The part of the electromagnetic spectrum that is visible to the human eye (wavelengths between 400-700 nanometers)
- Invisible Light: Includes ultraviolet (UV), infrared (IR), X-rays, gamma rays, and radio waves

Definition: A shadow is the dark area that appears on the ground or on other surfaces when something or someone blocks the light from shining on those areas.
Formation of Shadows:
- Occurs when an object blocks the light from reaching a surface
- The shape and size of the shadow depend on the shape and size of the object, as well as the position of the light source
Types of Shadows:
- Umbra: The darkest part of the shadow where the light is completely blocked
- Penumbra: The lighter part of the shadow where the light is only partially blocked
Applications of Shadows:
- Art and Design: Shadows are used to create depth, dimension, and texture in art and design
- Photography: Shadows can add depth and interest to photographs
- Science and Technology: Shadows are used in fields such as astronomy, optics, and computer graphics

Light is a form of electromagnetic radiation that is visible to the human eye.
Light has a dual nature, exhibiting both wave-like and particle-like properties.
Light travels at a speed of approximately 299,792,458 meters per second (m/s) in a vacuum.
Light can be reflected, refracted, absorbed, and transmitted by materials.

Visible Light has wavelengths between 400-700 nanometers and is visible to the human eye.
Invisible Light includes ultraviolet (UV), infrared (IR), X-rays, gamma rays, and radio waves.

A shadow is the dark area that appears on the ground or on other surfaces when something or someone blocks the light from shining on those areas.
Shadows form when an object blocks the light from reaching a surface.
The shape and size of the shadow depend on the shape and size of the object, as well as the position of the light source.

Umbra is the darkest part of the shadow where the light is completely blocked.
Penumbra is the lighter part of the shadow where the light is only partially blocked.

Shadows are used in art and design to create depth, dimension, and texture.
Shadows can add depth and interest to photographs in photography.
Shadows are used in fields such as astronomy, optics, and computer graphics in science and technology.

Light is a form of electromagnetic radiation visible to the human eye, with wavelengths between 400-700 nanometers.
Light has dual nature, exhibiting both wave-like and particle-like properties.
Light can travel through a vacuum and be refracted, reflected, and absorbed by matter.
Visible light is the part of the electromagnetic spectrum that is visible to the human eye, while invisible light includes ultraviolet, infrared, X-rays, and other forms.

A shadow is the dark area that appears when an object blocks light from shining on a surface.
Opaque objects block light completely, creating a dark shadow, while translucent objects allow some light to pass through, creating a partial shadow.
The umbra is the dark inner shadow where light is completely blocked, while the penumbra is the lighter outer shadow where light is only partially blocked.
Shadows are used in optics to study the behavior of light and its interactions with matter, and in art and design to create depth, texture, and mood.