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Light- reflecton and light

What kind of waves are light waves?

Electromagnetic waves

What are electromagnetic waves?

they consist of oscillating electric and magnetic fields, which radiate outward from the sound source at the speed of light in transverse waves

lightwave medium?

light waves have no medium

Speed of light

a constant (variable "C")

Value of Speed of light

C=3.00*10 to the power of 8 m/s

Speed of light equation #2

C= wavelength times freq

Huygen's Principle

any point on a wave front can be considered the source of a new wave

What can waves be approximated as?

rays

what does the intensity of light depend on?

power of the light source and the distance from the source

What happens when light travels through a uniform substance?

it travels in a straight line

What happens to light when it encounters an opaque surface?

some of the light is absorbed and some is reflected

Opaque

you can see the light on its surface but you can't see through it

Translucent

can see light but can't see the object behind it

Reflection

the change in direction of an electromagnetic wave on a surface that causes it to move away from the surface

What affects how light is reflected?

The texture of the surface it is reflected on

How does a rough surface effect reflections?

reflects the light in many directions (diffuse reflection)

How does a shiny surface affect reflections?

reflects the light in one direction (specular reflection)

Normal line of reflection

line perpendicular to the reflecting surface

Angle of incidence

angle between the incoming ray of light and the normal line

Angle of reflection

the angle formed by the outgoing ray of light and the normal line

What is the angle of incidence equal to?

the angle of reflection

What is the object image in a flat mirror

a virtual image that comes from a location behind the mirror; the light appears to come from behind the mirror

What does the virtual image in a flat mirror appear to be?

the same distance from the mirror as the object

What is the size of the virtual image in a flat mirror?

same size as the object being reflected

What mirror causes the reflection to be reversed?

flat mirror

What is the relationship between frequency and wavelength

inverse- as one decreases the other increases

What do scientists consider light's speed to be?

Finite- limited number

Are perfect reflectors common?

no

What is used to predict the location of an image?

simple geometry, the law of reflection, and ray diagrams

What is the difference between real and virtual images?

Real images can be displayed on a surface, virtual images cannot

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