Light - an ___________________ wave (EM wave). It cantravel without a _______________. It can travel through _______or _______________ and consists of changing ________________and _____________________ fields.•A field is a __________ around an object that can exert a _________ on another object without actually ______________ the object.•Electromagnetic waves are __________________ waves with theelectric and magnetic waves _______________ to each other and to the direction of the __________ motion.

electromagneticmedium space

matter electricmagnetic

region forcetouching

transverseperpendicular

waveLight is produced by the _______________of an electrically charged particle whichis surrounded by an ___________ _________.A vibrating electric field creates a ____________________. These fields vibrating togethermake an ____ wave. Energy released in the form of an EM wave is called _____________.

vibration

electric fieldmagnetic

fieldEM

radiation

When electrons in an atom absorb ___________, they jump tohigher energy levels temporarily. When they fall back to a lowerenergy level, they give off a packet of energy called a ___________.When the electrons move back and forth, they give off a _________of photons, making an ____ ___________ which carries the energy.Light has a __________ personality: it can be considered to haveproperties of both ____________ and _____________.

energy

photon

EM waveduel

particles waves

The speed of light in a vacuum is______________ or _________ m/s.The speed of light is equal to the _____________ times the __________.The ______________ _____________ is made up of different ____________of light, including _________ ___________________, ___________, and__________ ___________.

300,000,000 3 x 108

wavelength frequencyelectromagnetic spectrum

wavelengthsradio waves

microwaves X-raysvisible light

stream

Low energy High energy

The human eye can see__________ light, beesand other insects can see ___________ light,and pit vipers can see____________ light.__________ light is thecombination of all the colors of visible light.______________ rays cancause ______________._______________ are used for cooking food._________ are used todetect broken bones.

visible

ultraviolet

infrared

White

Interaction of light waves: 1. Reflection: This occurs when waves ___________ off an object.The Law of Reflection states that the ___________ __ ____________is equal to the ___________ ___ _____________.

bounceangle of incidence

angle of reflection

Ultravioletsunburn

Microwaves

X-rays

__________ ________ occurs on smooth, polished surfaces wherethe light is reflected at the sameangle. ___________ __________occurs on rough surfaces wherethe light is reflected at all different ______________.

Regular reflection

Diffuse reflection

angles

2. Absorption and Scattering: Absorption is the _____________ of___________ carried by light waves to particles of ____________.Scattering is the _____________ of light energy by particles of____________ that have absorbed energy. Why is the sky blue?______________________________________________________________________________________________________________

transferenergy matter

releasematter

Air particles scatter sunlight, and light with the shortest wavelength(blue light) scatters more, spreading out to fill the sky.

3. Refraction: This is the ____________ of a wave as it passes at an___________ from one ____________ to another. This is becausewaves travel at different ____________ through different media.

bendingangle medium

speeds

The angle of ________________ isdifferent from the angle of____________________. Whenwhite light passes through a prism,the light is ______________ and separated into the various ________.

incidence

refraction

separatedcolors

4. Diffraction: This is the ___________ of waves around ___________or through open ______________. Light waves do not diffract as much as water waves and are hard to see.

bending barriersspaces

5. Interference: This occurs when 2 or more waves ______________.A. Constructive interference: The amplitudes of the wavesare __________ together, creating brighter areas.B. Destructive interference: The amplitudes of the waves are______________, creating dimmer areas or eliminating thelight altogether.

overlap

added

subtracted

This is a picture ofinterference when lightdiffracts through ___ slits.

This shows the interfer-ence pattern from redlight passing through___ slits.27

When light interacts with matter, it can be _______________,__________________, or __________________, depending on theproperties of the matter. If the matter is shiny or light colored, mostof the light will be ________________. If the matter is dull or darkcolored, the light will be _______________. If the matter is clear,light will be ________________ (the light will ________ _________the matter).

reflectedabsorbed transmitted

reflectedabsorbed

transmitted pass through

Materials : 1. Transparent: visible light is easily _____________ through.Ex: ___________, _____________, _____________2. Translucent: Transmits light but also ____________ light as it passes through. Ex:____________3. Opaque: Does not transmit light. Ex: _________, _________

passesair glass water

waxed paperwood metal

scatters

Colors of objects: We see an object to be a certain color becausethe light that reaches our ________ is the color that is ____________off the object. All the other colors of light are _____________ by the object. ______________ is the absence of all ____________ being reflected because all of the light that hits a black object is________________. If you were out in the hot desert, what colorwould be best to wear to keep cool? ________________

eyes reflectedabsorbed

Black colors

absorbedWhite

Mirrors: They come in 3 types:__________, ____________, and_________.1. Plane mirrors are flat and create images that are _____________, the same __________, but _______________.

plane concaveconvex

uprightsize reversed

2. Concave mirrors: These are ____________ like the inside of a _____________. They can form both ________ and ____________images. Reflected light rays cross each other at the _______ _______.If the object is between the mirror and the focal point, the image will be _____________. If the focal point is between the object and themirror, the image will be ____________. If the object is at the focalpoint, there will be ____ image.

curvedspoon real virtual

focal point

virtualreal

no

Concave virtual image Concave real image

3. Convex mirrors: These are curved like the outside of a spoon. Allimages are __________, _____________, and ___________ than the original object.

Convex virtual image

virtual upright smaller

A ________ is a curved, transparent object that forms an image by________________ light.1. Convex Lenses - These are thicker in the middle than at the edges.If the object is less than one _________ __________ away from the lens, the image will be ___________ and __________than the object.If the object is more than one focal point away, the image will be__________ and _____________.These lenses are used in _____________________ and ____________.

lensrefracting

focal lengthvirtual larger

real invertedmovie

projectors cameras

2. Concave Lenses - These are thicker at the edges and thinner inthe middle. They produce ___________, ___________ images.smaller virtual

Light - an ___________________ wave (EM wave). It cantravel without a _______________. It can travel through _______or _______________ and consists of changing ________________and _____________________ fields.•A field is a __________ around an object that can exert a _________ on another object without actually ______________ the object.•Electromagnetic waves are __________________ waves with theelectric and magnetic waves _______________ to each other and to the direction of the __________ motion.

Light is produced by the _______________of an electrically charged particle whichis surrounded by an ___________ _________.A vibrating electric field creates a ____________________. These fields vibrating togethermake an ____ wave. Energy released in the form of an EM wave is called _____________.

When electrons in an atom absorb ___________, they jump tohigher energy levels temporarily. When they fall back to a lowerenergy level, they give off a packet of energy called a ___________.When the electrons move back and forth, they give off a _________of photons, making an ____ ___________ which carries the energy.Light has a __________ personality: it can be considered to haveproperties of both ____________ and _____________.

The speed of light in a vacuum is______________ or _________ m/s.The speed of light is equal to the _____________ times the __________.The ______________ _____________ is made up of different ____________of light, including _________ ___________________, ___________, and__________ ___________.

Low energy High energy

The human eye can see__________ light, beesand other insects can see ___________ light,and pit vipers can see____________ light.__________ light is thecombination of all the colors of visible light.______________ rays cancause ______________._______________ are used for cooking food._________ are used todetect broken bones.

Interaction of light waves: 1. Reflection: This occurs when waves ___________ off an object.The Law of Reflection states that the ___________ __ ____________is equal to the ___________ ___ _____________.

__________ ________ occurs on smooth, polished surfaces wherethe light is reflected at the sameangle. ___________ __________occurs on rough surfaces wherethe light is reflected at all different ______________.

2. Absorption and Scattering: Absorption is the _____________ of___________ carried by light waves to particles of ____________.Scattering is the _____________ of light energy by particles of____________ that have absorbed energy. Why is the sky blue?______________________________________________________________________________________________________________.

3. Refraction: This is the ____________ of a wave as it passes at an___________ from one ____________ to another. This is becausewaves travel at different ____________ through different media.

The angle of ________________ isdifferent from the angle of____________________. Whenwhite light passes through a prism,the light is ______________ and separated into the various ________.

4. Diffraction: This is the ___________ of waves around ___________or through open ______________. Light waves do not diffract as much as water waves and are hard to see.

5. Interference: This occurs when 2 or more waves ______________.A. Constructive interference: The amplitudes of the wavesare __________ together, creating brighter areas.B. Destructive interference: The amplitudes of the waves are______________, creating dimmer areas or eliminating thelight altogether.

This is a picture ofinterference when lightdiffracts through ___ slits.

This shows the interfer-ence pattern from redlight passing through___ slits.

When light interacts with matter, it can be _______________,__________________, or __________________, depending on theproperties of the matter. If the matter is shiny or light colored, mostof the light will be ________________. If the matter is dull or darkcolored, the light will be _______________. If the matter is clear,light will be ________________ (the light will ________ _________the matter).Materials : 1. Transparent: visible light is easily _____________ through.Ex: ___________, _____________, _____________2. Translucent: Transmits light but also ____________ light as it passes through. Ex:____________3. Opaque: Does not transmit light. Ex: _________, _________

Colors of objects: We see an object to be a certain color becausethe light that reaches our ________ is the color that is ____________off the object. All the other colors of light are _____________ by the object. ______________ is the absence of all ____________ being reflected because all of the light that hits a black object is________________. If you were out in the hot desert, what colorwould be best to wear to keep cool? ________________

Mirrors: They come in 3 types:__________, ____________, and_________.1. Plane mirrors are flat and create images that are _____________, the same __________, but _______________.

2. Concave mirrors: These are ____________ like the inside of a _____________. They can form both ________ and ____________images. Reflected light rays cross each other at the _______ _______.If the object is between the mirror and the focal point, the image will be _____________. If the focal point is between the object and themirror, the image will be ____________. If the object is at the focalpoint, there will be ____ image.

Concave virtual image Concave real image

3. Convex mirrors: These are curved like the outside of a spoon. Allimages are __________, _____________, and ___________ than the original object.

Convex virtual image

A ________ is a curved, transparent object that forms an image by________________ light.1. Convex Lenses - These are thicker in the middle than at the edges.If the object is less than one _________ __________ away from the lens, the image will be ___________ and __________than the object.If the object is more than one focal point away, the image will be__________ and _____________.These lenses are used in _____________________ and ____________.

2. Concave Lenses - These are thicker at the edges and thinner inthe middle. They produce ___________, ___________ images.