Review: Science Exam

Radio Waves, Microwave, IR Radiation, Visible Light, UV Radiation, X-rays, Gamma-rays

Correct order of EM Radiation with increasing frequency

Transverse

Electromagnetic waves are _____

Television, infrared, visible light, X-rays

Which of the following correctly lists electromagnetic waves in order from longest to shortest wavelength?

Gamma rays have greater energy than visible light for penetrating matter

Why are high-frequency gamma rays more dangerous to humans than visible light?

Gamma ray

Which type of EM radiation has the shortest wavelengths?

Global Positioning System

By using ______, you can determine your exact position and altitude on Earth.

Letter B

Which diagram represents electromagnetic energy with the shortest wavelength?

Wavelength

What part of a wave is shown at point 1

Trough

What part of a wave is shown at point 2

Amplitude

What part of a wave is shown at point 3

Crest

What part of a wave is shown at point 4

EM or Transverse Wave

What kind of wave is represented by this diagram?

Increases

As the frequency of a wave ____ the wavelength becomes smaller

Visible Light

____ has a shorter wavelength and higher frequency than infrared rays.

X rays

_____ shorter wavelength and higher frequency than UV-rays. It carries a great amount of energy

Photons

Light is made of little particles called _____

Straight path

Light can travel in a

Light

Is a form of EM Wave that is propagated perpendicular to the source of energy

Absorption

Of light energy is converted into some other form, such as thermal or heat energy

Refracted

Light when passes from one medium into another, it changes direction slightly this is called ______

Transmitted

Light can be _____, sometimes it passes through a certain matter.

Equal

Angle of incidence is to the angle of reflection

Bends away from normal

A ray of light when passing from glass to air, ________

lower speed

Light travels at a _____ in water than in air

same straight-line path

Light travels in the _______ while passing through different media.

Reflected rays

_______ are formed when light strikes the surface of an object

transmitted light

The ________ is the difference if incident light and absorbed light

Index of Refraction (n)

______ is the ratio of the speed of light in a vacuum and the speed of light in the material

Always greater than 1

The indices of refraction of different materials are always ______

Wavelengths

White light is actually a combination of several different ____ of light traveling together.

Red

Which has the longest wavelength?

Violet

Which has the shortest wavelength?

White Light

All the colors in the visible spectrum put together will form

Rays

Light travels in straight paths called ___.

Wave-particles

Sir Issac Newton describe light as ___.

Dispersion, Refraction, Reflection

The particle theory of light can explain the following phenomena ______.

Refraction

Light beam changes its direction when it strikes a boundary between air and water.

Frequency

When light crosses a boundary between air and water, the following quantity of light remains the same _____

Red

Sun rays fall on a grass prism. What light ray will be refracted the least?

Reflected

Light that bounces off an object is

Disappears

A student conducts an investigation to determine the focal length of a convex lens. She holds the lens in front of her and looks through it at a distant object. She slowly moves the lens towards her eye. She knows she is holding it at the focal length when the image

Diverging

A lens is used to produce a virtual image that is smaller than the object the lens must be a _ lens

Convex mirror and concave lens.

Identify the list below that contains items that diverge light rays.

Total Internal Reflection

also the principle behind fiber optics.

ROYGBIV

Is a way of remembering the colors of the visible spectrum.

A Concave Lens (diverging)

thinner in the middle than at the edges and spreads the light passing through it.

transmitted, reflected, or absorbed

When light or sound waves hit an object, they can be _______, _______ and _______

Light travels to you faster than sound.

Why do you see lightning before hearing thunder

A Convex Lens (converging)

is thicker in the middle than at the edges and focuses the light passing through it.

Speed, Direction. The change in speed causes it to bend.

When light changes ___, it also changes ____.

300,000 km/s

All electromagnetic waves travel at ________ through a vacuum.

look identical to images formed by flat mirrors.

Images formed by spherical mirrors will ___

bends

* Light ____ when it travels from air into water (Slower)
* Bending of light depends on the medium and the density of the medium

color of light it reflects.

The color of an object is really the ___

Electromagnetic waves

are made by vibrating electrical charges that can travel
through matter.

same electric charge

Particles with the _____ repels each other

opposite charge

Particles with the _____ attract each other

vibrating electrical charges that can travel through matter.

Electromagnetic waves are made by ________