Energy
Electromagnetic Spectrum
Waves
Definitions
Definitions 2
100

The different forms of energy are : 

(i) Mechanical energy (ii) Heat energy (iii) Light energy (iv) Chemical energy (v) Sound energy     

100

Energy is transferred from the Sun to Earth mainly by

Radiation

100

Unit of Measurement 

m/s

100

Resonance

when one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion


100

Amplitude 


200

    What are the two kinds of mechanical energy.   

   potential energy, and kinetic energy.  

200

The part of the electromagnetic spectrum consists of waves that are detectable by the human eye.

Visibal Light 

200

What is the wavelength of a wave?

The distance between two consecutive crests or troughs of a wave.

200

Refraction

Refraction is the change in direction of waves that occurs when waves travel from one medium to another. 



200

Rest Position

this can also be called the equilibrium position and is the undisturbed position of the particles if they do not vibrate.

300

 Define the term energy.

 Energy is the capacity of doing work.

300

the range of all electromagnetic frequencies, including radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays and gamma rays

Electromagnetic  Spectrum 

300

Wavelength


300

Mirage 

  An optical illusion that occurs when light passes through layers of air with different temperatures and densities, creating the appearance of a reflected image of a distant object on the surface of the ground, such as a lake or a road.

300

Crest

Highest point in a wave 

400

What form of energy is most harmful to humans 

Gamma Rays 

400

Which color of the visible light has the shortest wavelength?

Violet

400

What is the frequency of a wave?

The number of wave cycles that pass a point in one second.

400

dispersion

Separation of visible light into its different colors is known as dispersion

400

Trough

the lowest point on a wave

500

which form of energy is blocked by the ozone layer in the stratosphere 

Ultraviolet 

500

Which color has a wavelength of 600 nm (6.0 x 10² nm)?

Orange

500

Wave speed =

Wavelength x frequency

500

Angle of incidence  

Angle of incidence  = angle of reflection [ for a flat surface] 

angle that the incident ray makes with the normal 


500

GPE
KE
TE

Gravitational potential energy 

Kinetic Energy 

Total Energy 


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