Electromagnetism
Circuits & Household circuits
Electromagnetic waves
Refraction
Diffraction & Light
100
What is Electromagnetism
Interaction between electrical charges , Magnetic moments and electromagnetic field .
100
What can Electrical Energy be converted to?
Heat Energy , Light Energy , Chemical Energy or Sound Energy .
100
What are electromagnetic waves ?
They are invisible forms of energy that travel throughout our universe .
100
What is refraction ?
Change in direction from one medium to another caused by its change in speed
100
What is diffraction ?
The spreading of waves around particles .
200
What is the difference between electric forces and magnetic forces ?
Electric forces made by electric charges either at rest or in motion .
Magnetic forces are produced by moving charges and act on the charges motion .
200
What are parallel circuits ?
components that are placed in parallel which the circuits then split the current flow .
200
What are waves ?
A wave can be a disturbance in physical medium or field .
It then results in vibration or oscillation .
200
What are the refraction laws ?
The incident ray, reflected ray and the normal, to the interface of any two given mediums , all lie in the same plane. The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.
200
What is the diffraction formula ?
300
How do electric and magnetic fields move around ?
They travel through space as waves of electromagnetic radiation .
300
What is series Circuit ?
A series circuit is a path along which the current flows through each component .
300
what is the wave equation ?
k = 2π/λ
300
How are electromagnetic waves refracted ?
They are refracted when crossing the boundary from one transparent medium to another .
300
When you combine all colors what do you get ?
You get white light .
400
Give an example of Electromagnetic waves travelling through space ?
Radio Waves , Television Waves , Microwaves , Infrared rays , X-ray and gamma rays .
All travelling at the same speed .
400
What type of resistance does a High tension wire have?
Low resistance and large surface area .
400
What is the distance between the crest and the waves central axis called ?
Amplitude
400
What happens to sunlight entering a glass prism ?
The different Refractions of the various spread them apart as a rainbow .
400
What type of light does chlorophyll absorb ?
Absorbs all light reflecting green .
500
How does a Magentic field interact with a charged object ?
if the charge is at rest there is no interaction , if the charge moves it is subject to force that increases with the velocity of the charge .
500
What is an Electrical Fuse ?
Is a Safety device made to prevent damage to an electrical circuit when too much current flows through it .
500
explain photons
Any kind of Electro-Magnetic wave travels in small energy packets called photons. In the visible range of light these are called photons and in the invisible range, i.e Infrared, UV and others the energy are called quanta.
500
What is a ray of sunlight composed of ?
It is composed of many wavelengths that appear to be colorless .
500
What is a material no light can pass through ?
Opaque