Wavelength, Amplitude, and Frequency
Define Wavelength??
The Distance from crest to crest or trough to trough!
Define Reflection??
Light bounces back!
Define Alternate Current?? (AC)
Goes in a variety of directions, changing directions often!
Define Amps??
The amount of electricity being pushed through an object!
Which type of electromagnetic wave has the shortest wavelength??
Gamma Rays!
Define Amplitude??
Crest to middle or Trough to middle!
Define Refraction??
Bending of light!
Define Direct Change?? (DC)
Goes in one direction!
Define Current??
How much electricity flows through at a time through an object!
Which type of electromagnetic wave has the longest wavelength??
Radio Waves!
Define Frequency??
The Crest to Trough or Trough to Crest!
Define Absorption??
Light is taken in!
An Example of Alternate Current (AC) & Direct Change (DC)??
Alternate Current (AC) Ex. Hoover Dam!
Direct Change (DC) Ex. Battery!
How many amps of electricity can kill you??
100-200 mA!
What are the 7 types of electromagnetic waves??
Radio Waves: Instant Communication!
Microwaves: Data & Heat!
Infrared Waves: Invisible Heat!
Visible light Rays!
Ultraviolet Waves: Energetic Light!
X-rays: Penetrating Radiation!
Gamma Rays: Nuclear Energy!
Does amplitude affect frequency or wavelength?
It does not affect wave speed. An increase in wave frequency caused a decrease in wavelength while the wave speed remained constant. So while the frequency did not affect the speed of the wave, the tension in the medium (the center) did.
What is the law of reflection??
The principle that when a ray of light, radar pulse, or the like, is reflected from a smooth surface angle of reflection is equal to the angle of incidence, and the incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane!
The frequency of AC??
The distance of AC??
Which has more energy DC or AC??
Higher Frequency!
Travel long distances!
Alternate Current! (AC)
Do more amps mean more power??
Effectively, this means those applications can suck more power per minute than appliances rated at 120 V. Watts!
What are the most dangerous waves on the electromagnetic spectrum??
X-rays, Gamma rays, Ultraviolet light rays, and microwaves!
How do you calculate the wavelength??
Plug the waves speed and waves frequency into the equation. Dividing speed by frequency gives you the wavelength. For example: Find the wavelength of a wave traveling at 20 m/s at a frequency of 5 Hz!
What is the difference between reflection, refraction, and absorption??
The light wave could be absorbed by the object, in which case its energy is converted to heat. The light wave could be reflected by the objected. And the light wave could be transmitted by the object... When this occurs, objects have a tendency to selectively absorb, reflect or transmit light certain frequencies!
The Frequency of DC??
The distance of DC??
Which has less energy AC or DC??
Low Frequency!
Travel short distances!
Direct Current! (DC)
How is an electric current calculated??
The current can be found from Ohm's law, V=IR. The V is the battery voltage, so if R can be determined then the current can be calculated. The first step, then, is to find the resistance of the wire: Lis the length, 1.60 m!
Define Electromagnetic Spectrum??
Is a continuum of all electromagnetic waves arranged according to frequency and wavelength!