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Flashcards in Unit 8 Deck (19)
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1
Q

Angle of Incidence

A

angle at which a light ray arrives at or strikes a surface

2
Q

Blueshift

A

the apparent shift in frequency of an electromagnetic wave toward the shorter-wavelength (blue) end of the visible spectrum observed when an object is moving away from an observer

3
Q

Color

A

an attribute of things that results from the light they reflect, transmit, or emit, to the extent that the light causes a visual sensation dependent on the wavelengths of the visible light

4
Q

Electromagnetic

A

of waves, consisting of vibrating electric and magnetic fields, the field energy of which radiates outward at the speed of light

5
Q

Electromagnetic Radiation

A

\ih-LEK-troh-mag-NEH-tik\

waves of energy associated with electric and magnetic fields; results from the acceleration of an electric charge

6
Q

Electromagnetic Spectrum

A

the entire range of electromagnetic radiation, from the longest wavelengths to the shortest wavelengths

7
Q

Electromagnetic Waves

A

a wave consisting of vibrating electric and magnetic fields, the field energy of which radiates outward at the speed of light

8
Q

Index of Refraction

A

gives the amount of refraction occurring for light passing from one medium to another; also refractive index

9
Q

Light Ray

A

a straight line that represents the path of light

10
Q

Light-Year

A

the distance that light travels through space in one earth year; light travels through space at a speed of 186,000 miles per second

11
Q

Normal

A

in reflection and refraction of light, refers to a line perpendicular to the surface of incidence

12
Q

Optics

A

the study of the physical properties of light; in physics, the science of the propagation of light

13
Q

Photon

A

a particle of electromagnetic energy

14
Q

Prism

A

\PRIH-zuhm\

a wedge-shaped transparent body that causes incident light to be separated by color on the light´s exit from it

15
Q

Redshift

A

the apparent shift in frequency of an electromagnetic wave toward the longer-wavelength (red) end of the visible spectrum observed when an object is moving away from an observer

16
Q

Reflection

A

process whereby light bounces back from an object at the same angle and intensity that the object received it

17
Q

Refraction

A

the bending of light as it moves from one medium to another

18
Q

Vaccum

A

space without matter; absence of pressure

19
Q

Wave

A

a disturbance that travels through a medium transporting energy from one location to another location