Light Energy Presentation Gianna Funari 5th Grade Mrs. Branin How - - PowerPoint PPT Presentation

Light Energy Presentation

Gianna Funari 5th Grade Mrs. Branin

How does Light Travel?

• Light travels in a straight line, but

light will usually change

• directions. It will change

directions when it passes from

• ne substance to the other. Light

can travel through air and water, light is also like a wave. A wave follows a straight path, just like how light only goes in a straight

• line. Light does always go in a

straight line, but if reflects off a flat

• r polishes surface, it can go in

changed direction. Example: the way a basketball in bounced on an angle to a person is like how a light bounces off a surface.

What is a Concave Mirror?

• A mirror that curves on the

shiny side is a concave mirror. Curved mirrors create a variety of images that can be

• f practical use. A concave

mirror mostly depends on how far the object is from the

• mirror. When an object moves

much further back from the mirror, the image remains upside-down, but gets smaller and smaller.

What is a Convex Mirror?

• Mirrors that curve out on the shiny

side at convex mirrors. Convex mirrors always form reduced upright images. Convex mirrors can be used in stores as security

• r sometimes you might see it
• elsewhere. They give a wide-

angle view. When you look at one and see a car in the convex mirror they can seem to be further away than they actually are. An example of a coaxes mirror is: a back side of a spoon. I'm sure there are many other examples of convex mirrors though.

What is Polarization?

• In this photo you see glasses,

reflected light is often naturally polarized to vibrate sideways. Light can be polarized, like these lens in the glasses. We use many products to control

• light. Examples of polarization

can be: glasses, a car, and many more. A cars windows can be applied as a darker tint. That's why it is polarization. Polarizing materials in sunglasses, however, let through only the light that is vibrating up and down.

What is Translucent, Opaque, and Transparent?

• There are some objects that light

passes through, and there are

• bjects where light can't pass
• through. Examples: Opaque,

Transparent, and Translucent. Opaque is when light is completely blocked off, meaning light can't go through it, like a

• desk. Translucent is when some

light can not pass through, but some light can, like tinted windows in cars. Transparent is when all light can pass through an

• bject, like a glass cup. Not all

light passes through objects, just like these.

What happens when light passes through matter?

• When light passes through

matter it casts a shadow in its

• presents. Light can't go

through matter so instead it goes around it. Light only goes in a straight line so if it goes towards a rock, it won't be able to go through. For example: if you shine a flashlight on a matter object, it will not go through to object but cast shadows Behring where the light is not shined.

What is Refraction?

• Rarefaction waves travel

expanding from distance to

• distance. When bending of

light occurs, the light rays may bend as they move from one substance into another is called rarefaction.

What is a Prism and how does it affect Light?

• A prism refracts all different

types of colors. Or wavelengths as well, in different amounts. The light Is more than one wavelength, on the prism. The wavelength is the distance from crest to

• crest. The light on a prism

refracts from red all the way to

• violet. Showing the longest

and shortest wavelengths.

What is an Electromagnetic Spectrum?

• The wavelengths we can and the
• nes we cannot see are called

Electronic Spectrum. We can see wavelengths that make up color, some wavelengths that are longer than red light and shorter than violet. The wavelengths that are longer than red are Radio Waves, Microwaves, and infrared

• Light. Wavelengths that are

shorter than violet light is Ultraviolet Light, X rays, and last Gamma rays. Those are the electric spectrums of color light, the ones that can be seen.