5th grade chapter 14 section 3 - what is light energy
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Transcript of 5th grade chapter 14 section 3 - what is light energy
![Page 1: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/1.jpg)
CHAPTER 14 SECTION 3
![Page 2: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/2.jpg)
![Page 3: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/3.jpg)
Electromagnetic Radiation–a combination of electrical and magnetic
energy• Like sound, light travels in waves that have
certain wavelengths and frequencies. • Its speed is different in different materials.• Light can be reflected or absorbed by certain
objects, or it can pass through them.
![Page 4: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/4.jpg)
Electromagnetic Radiation• Some types of electromagnetic radiation have
wavelengths that are shorter than those of visible light.
ex: ultraviolet, x-ray, & gamma ray radiation• Longer waves have lower frequencies and
lower energies. ex: infrared waves, microwaves,
& radio waves.
![Page 5: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/5.jpg)
How Does Light Move?
• Light travels the fastest in a vacuum. • It travels more slowly through materials
such as air or water.• Moves in straight lines.• If it reflects off an object light still moves
in a straight line but in a different direction.
![Page 6: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/6.jpg)
• Light bends, or refracts, whenever it enters a new material
• White light that enters a prism comes out separated into its colors.
• A rainbow appears in the sky when light reflects and refracts in water droplets.
![Page 7: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/7.jpg)
• An object in the path of light waves casts a shadow.
• The object casting the shadow blocks the path of light.
• A shadow is larger when the object is closer to the light source.
![Page 8: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/8.jpg)
CONCAVE vs. CONVEX
Convex Lens: A magnifying glass contains a convex lens that bends light raysto make objects look larger.
Concave Lens: A concave lens is thinner in the middle than the edges. It can bend light rays to make an objectlook smaller.
![Page 9: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/9.jpg)
![Page 10: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/10.jpg)
Electromagnetic Radiation–a combination of electrical and magnetic
energy• Like sound, light travels in waves that have
certain wavelengths and frequencies. • Its speed is different in different materials.• Light can be reflected or absorbed by certain
objects, or it can pass through them.
![Page 11: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/11.jpg)
Electromagnetic Radiation• Some types of electromagnetic radiation have
wavelengths that are shorter than those of visible light.
ex: ultraviolet, x-ray, & gamma ray radiation• Longer waves have lower frequencies and
lower energies. ex: infrared waves, microwaves,
& radio waves.
![Page 12: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/12.jpg)
How Does Light Move?
• Light travels the fastest in a vacuum. • It travels more slowly through materials
such as air or water.• Moves in straight lines.• If it reflects off an object light still moves
in a straight line but in a different direction.
![Page 13: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/13.jpg)
• Light bends, or refracts, whenever it enters a new material
• White light that enters a prism comes out separated into its colors.
• A rainbow appears in the sky when light reflects and refracts in water droplets.
![Page 14: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/14.jpg)
• An object in the path of light waves casts a shadow.
• The object casting the shadow blocks the path of light.
• A shadow is larger when the object is closer to the light source.
![Page 15: 5th grade chapter 14 section 3 - what is light energy](https://reader036.fdocuments.in/reader036/viewer/2022062617/54be94ce4a7959ff518b45c9/html5/thumbnails/15.jpg)
CONCAVE vs. CONVEX
Convex Lens: A magnifying glass contains a convex lens that bends light raysto make objects look larger.
Concave Lens: A concave lens is thinner in the middle than the edges. It can bend light rays to make an objectlook smaller.