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Shedding Light

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Questions and Answers

What is light?

A form of energy produced by the sun
Electromagnetic radiation causing the sensation of vision (correct)
A type of reflection from smooth surfaces
A physical substance that illuminates objects

Why do we need polished surfaces for reflecting light?

Polished surfaces enhance the color of reflected light
Polished surfaces emit a special type of light
Polished surfaces create a diffused reflection of light
Polished surfaces absorb less light and reflect maximum light (correct)

What is a mirror in scientific language?

A surface that reflects light and creates clear images (correct)
A device that emits light to create images
A substance like lead oxide used for coating glass
A glass piece with a shiny coating

What are the two types of mirrors mentioned in the text?

Plane mirrors and spherical mirrors (C) Signup and view all the answers

How is a mirror made?

By coating the back surface of a flat and smooth glass piece with a thin, reflecting film of aluminium or silver (D) Signup and view all the answers

What causes the sensation of vision?

Light is actually electromagnetic radiation (B) Signup and view all the answers

Why are polished surfaces needed for reflecting light?

Polished surfaces absorb less light (B) Signup and view all the answers

What type of reflection occurs from rough surfaces?

Rough surfaces reflect light irregularly (C) Signup and view all the answers

What is a mirror in scientific language?

A surface which reflects light and creates clear images (D) Signup and view all the answers

How are mirrors made?

By coating the back surface of a flat and smooth glass piece with a thin, reflecting film of aluminium or silver (B) Signup and view all the answers

Flashcards

What is light?

Electromagnetic radiation that causes the sensation of vision.

Why polished surfaces for reflection?

They absorb less light and reflect maximum light, creating clearer images.

What is a mirror?

A surface that reflects light and forms clear images.

Types of mirrors?

Plane mirrors (flat) and spherical mirrors (curved).

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How are mirrors made?

Coating the back of smooth glass with a thin, reflective film (aluminum or silver).

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Reflection from rough surfaces

Irregular reflection of light occurs from rough surfaces.

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Study Notes

What is Light?

Light is a form of electromagnetic radiation that allows us to see objects and colors.

Mirrors and Reflection

Polished surfaces are needed for reflecting light because they allow for specular reflection, resulting in a clear and undistorted image.
A mirror in scientific language is a reflective surface that bounces light back to our eyes, enabling us to see an image.

Types of Mirrors

There are two types of mirrors: plane mirrors and curved mirrors, each with different properties and applications.

Mirror Manufacturing

Mirrors are made by applying a thin layer of metal, usually aluminum or silver, to one side of a pane of glass.

Vision and Reflection

The sensation of vision occurs when light from an object is reflected into our eyes, allowing us to perceive the object.
Rough surfaces cause diffuse reflection, scattering light in all directions and making it difficult to see a clear image.
Polished surfaces are essential for mirrors to produce a clear and undistorted reflection.