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Module 5.4 Light energy

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1Module 5.4 Light EnergyBy: Rahma Salih Abdelgadir aka Sasha!
2What is the speed of light?300 million meters per second!
3What is the difference between how can light travel and how sound can travel?Light: Doesn't need material to travel though.
Sound: Sound must have something to travel though.
4What is electromagnetic radiation?Radiant energy released by stars.
5List 4 radiation from the sun.1. Radio waves
2. X-ways
3. Microwaves
4. UV radiation
6What is electromagnetic spectrum?The range of all forms of electromagnetic radiation.
7What is the difference between the waves of the electromagnetic spectrum?Their ONLY difference is in their wavelength and frequency.
8What is dispersion?The splitting of white light into colours of the rainbow.
9What is the visible spectrum?The band of colours produced from the splitting of white light.
10What is the order of of colours within the visible spectrum?1. Red 2. Orange
3. Yellow 4. Green
5. Blue 6. Indigo
7. Violet
aka
ROY G BIV
11What happens when you move though the spectrum towards the end?Wavelength of light decreases and frequency increases.
12What happens to light energy when it hits a surface ?1-Transmitted though the substance
2-Reflected from the surface
3-Absorbed into the substance
13What is reflection?The change in direction of a wave that bounces off a surface.
14What is an image?Figure of an object produced by reflected light or refracted rays of light.
15What are plane mirrors?Mirrors that are flat.
16What is a convex mirror?A mirror that curves outwards.
17What is a concave mirror?Mirror that caves inwards.
18What is refraction?The bending of light as it enters or leaves a material. $What is refraction?$
19What is convex lens?Lens that curves outwards.
20What is concave lens?Lens that curve inwards.
21What is short-sightedness or myopia?The lack to see things clearly unless they are some-what close to the eyes.
22What is long-sightedness or hyperopia?Incapable to see things clearly, especially if they are relatively close to the eyes.
23What are glasses or contact lens used for?Adjust the focus of your eyes back to the correct position.
24What are concave lens used for?Used to treat short-sightedness.
25What are convex lens used for?Used to treat long-sightedness.