The different forms of energy are :
(i) Mechanical energy (ii) Heat energy (iii) Light energy (iv) Chemical energy (v) Sound energy
Energy is transferred from the Sun to Earth mainly by
Radiation
Unit of Measurement
m/s
Resonance
when one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion
Amplitude
What are the two kinds of mechanical energy.
potential energy, and kinetic energy.
The part of the electromagnetic spectrum consists of waves that are detectable by the human eye.
Visibal Light
What is the wavelength of a wave?
The distance between two consecutive crests or troughs of a wave.
Refraction
Refraction is the change in direction of waves that occurs when waves travel from one medium to another.
Rest Position
this can also be called the equilibrium position and is the undisturbed position of the particles if they do not vibrate.
Define the term energy.
Energy is the capacity of doing work.
the range of all electromagnetic frequencies, including radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays and gamma rays
Electromagnetic Spectrum
Wavelength
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.
Crest
Highest point in a wave
What form of energy is most harmful to humans
Gamma Rays
Which color of the visible light has the shortest wavelength?
Violet
What is the frequency of a wave?
The number of wave cycles that pass a point in one second.
dispersion
Separation of visible light into its different colors is known as dispersion
Trough
the lowest point on a wave
which form of energy is blocked by the ozone layer in the stratosphere
Ultraviolet
Which color has a wavelength of 600 nm (6.0 x 10² nm)?
Orange
Wave speed =
Wavelength x frequency
Angle of incidence
Angle of incidence = angle of reflection [ for a flat surface]
angle that the incident ray makes with the normal
GPE
KE
TE
Gravitational potential energy
Kinetic Energy
Total Energy