Science: LQ 1 Review

Electrical and Magnetic disturbance that moves through space at the speed of light. (They can travel through empty space)

EM Waves are often classified by frequency in a schemem called _______

The _____ of the wave produced is the number of complete vibrations per second.

The wavelength of an EM wave depends on its_______.

The waves differ in the way they are produced and interact with matter and from each other in their _____ and ______

Each type of wave occupies a particular range of wavelengths known as _______

A throbbing pulse of electromagnetic radiation is called ______

Longest wavelengths and shortest frequencies in the EM Spectrum. Used to transmit radio and television signal.

Measure the time it takes a radio wave to travel from several satellites to the receiver, determining the distance to each satellite.

A type of radio wave that readily bends around builings and other objects that might be present in their path

Type of radio wave that has a shorter wavelength than the AM waves

A rate of oscillation in the range of about 3 kHz to 300 GHz, which corresponds to the frequency of radio waves, and the alternating currents that carry radio signals

They are basically extremely high frequency radio waves and have the shortest wavelengths. They have very short wavelengths ranging from approximately 1 millimeter to 30 centimeters.

Used to find the speed of an object by sending out radio waves and measuring the time it takes them to return.

A picture that shows regions of different temperatures in the body.

The closest in wavelength to the visible light

Type of Infrared which is closer to the microwave region of the EM spectrum

Determining the temperature of objects

Portion of the EM spectrum that is visible to the human eye.

EM radiation with a wavelength shorter than that of visible light, but longer than x-rays

This is produced by high-temperature surfaces, such as the sun.

High-energy waves which have great penetrating power and are used extensively in medical applications and in inspecting welds.

Generated by radioactive atoms and in nuclear explosions, and are used in many medical applications.

A procedure wherein multiple concentrated beams of gamma rays are directed on the growth in order to kill cancerous cells.

Energy produced by nuclear reactions at the core of the sun

Can be defined as the process of emitting energy by any particles, such as in the case of high-energy, protons, neutrons, atoms, and ions, and waves, either light or sound,

Are composed of unstable atoms that give off its excess energy until it becomes stable

Happens during the spontaneous change of an atom to be more stable

An especially damaging form of radiation which can create electrically charged ions in the material it strikes

Break apart atoms and molecules, causing severe damage in living organism

Basic unit used to measure exposure to ionizing radiation

Radiation exposure is expressed in _

An average person is exposed to ___ of whole body exposure per year from all sources

What part is at number 1?

What part is at number 2

What part is at number 3?

What part is at number 4?

What kind of wave is this?

Disturbances in space and time, they cannot propagate without a medium and they cannot travel in a vacuum or empty space

Form of an EM Wave that is propagated perpendicular to the source of the energy.

NOTE: They travel in a straight path

Properties of Light

It is the bending of light as it travels through one medium to another with different refractive indices

Relative quantification of how a medium propagates a specific wavelength of light

It is when light bounces off an object

An image formed on a plane mirror is _______

Light striking the plane mirror

An angle formed by the incident ray

An imaginary line perpendicular to the surface of the plane mirror.

Formed when light strikes the surface of an object

The angle of incidence is equal to the angle of reflection

Image that apperas in a different location than its actual location

There is no speed greater than light; thus, the indices of refraction of different materials are always greater than 1

Refers to the process where light passes through an object or medium without being absorbed

Ratio between absorbed light and the incident light. it is unitless and it is used to examine how efficient a medium is in transmitting light.

Occurs as light passes through a medium with the same natural frequency

Medium that diffracts light

The seven colors

A manifestation that indeed light is composed of seven colors

Components of ight with varying wavelengths

It has both the properties of a wave.

Beam in the first medium. It hits the boundary at an angel of incidence

Beam in the second medium. it leaves at an angle of refraction

When light moves from air to water it _______. Making the angle of incidence greater than the angle of refraction

Light bending toward the normal indicates the speed is ____

Light bending away from the normal indicates the speed is _____.

The angle of incidence is ____ to the angle of refraction

Describes the relationship between the angle or incidence and the angle of refraction.

Ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant

Degree to which light is bent depends on the ____ and the _____ of the medium.

Light going from a vacuum into another medium is called _____

Speed of light is dependent on the properties of the _____

Determines how much energy is absorbed and re-emitted in a medium and determines the speed of the light in the medium

The ____ the optical density, the ____ the light wave.

Light wave is transporting _____

When light hits a boundary. Some energy is transmitted to the new medium, some energy is _______

______ sparkle because most of the light rays hitting the stone are internally reflected

Transmit information in pulses of light. used in telecommunications, computer networking, by mechanics, and doctors.

Equation for Snell's Law:

Are formed when light strikes a reflecting surface, such as mirror or a lens

(The presence of material) Interactions with electrical properties of atoms will ____.

Image is made from "real" light rays that converge at a real focal point. Can be projected onto a screen and it is always inverted.

"Not Real" because it cannot be projected, the Image only seems to be there.

If light energy doesn't flow from the image, the image is _____

Is a mirror with a curved reflecting surface.

2 Types of Curved Mirrors

A type of mirror that curves inward and may form a real or virtual image

A mirror that curves outward, reduces image and forms virtual images.

The "light slowing factor" is called the _____.

Lens that converges. Thicker in the center than edges. Forms real images and virtual images depending on position of the object.

Eyeball is too long and image focuses in front of the retina.

Concave lenses expand focal length

Eyeball is too short so the image is focused behind the retina

Convex Lens shortens the focal length