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How does light travel and interact with matter

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safa-medaney

Light is made up of electric and magnetic waves that travel in a straight line at very high speeds, such as 90 million miles from the sun to earth. Light can pass through transparent materials like glass that allow most light through, is partially blocked by translucent materials like wax paper, and is completely blocked by opaque materials like metal that form shadows. The position of shadows depends on the position of the light source.

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How does light travel and interact with matter? Chapter 12: Lesson 3:
What is light made up of? Electric waves Magnetic waves
Determine what is transparent, translucent and opaque.
Types of materials Transparent Translucent Opaque Allow most light to pass through them. Allow some light to pass through them. No light can pass through them.
Distance traveled by light from sun to earth =90 million miles Light travels at very high speed.
Light can travel through vacuum. Speed of light in vacuum is faster than its speed in solid, liquid or gas.
Light travels in a straight line.
When light does not pass through opaque objects it forms SHADOWS.
Position of the SHADOW depends upon the position of the light source. Example:
Draw the sunlight rays falling on the objects.
Determine the position of the sun in the following pictures.

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How does light travel and interact with matter