1. Livelihood
   Fine Arts
2. Carpentry
   Science

Look up EMR under science. It's studied in physics.

1. Chemistry
   Electricity
2. Genetics
   Nuclear fission

EMR deals primarily with electricity. The electric field is the first field studied here, in conjunction with another.

1. Magnetism
   Animal husbandry
2. Physics
   Anatomy

Electricity and magnetism come into play when discussing EMR. That's the main reason why it's called EMR.

1. 12th century
   21st century
2. 18th century
   10 AD

Curiosity about magnetism has existed since the ancient times, and curiosity about electricity has been appearing since the 17th century. But it was during the 18th century when intelligent minds started to look into electromagnetic factors more closely.

1. 13th century
   20 BC
2. 19th century
   21st century

It was sometime in the 1870s when a unified theory regarding electromagnetism took place. A lot of other related breakthroughs happened after that.

1. James Clerk Maxwell
   Alexander Graham Bell
2. Sir Isaac Newton
   Charles Darwin

It was James Clerk Maxwell who first proposed and developed electromagnetism as a unified theory. He was a physicist from Scotland.

1. Money
   Air
2. Energy
   Taxes

EMR is an ever-present kind of energy. Yes, it's all around us!

1. They hate each other.
   They like each other.
2. They are at right angles.
   They don't exist simultaneously.

When the electric field and the magnetic field meet up, the two meet at right angles. That means they are 90 degrees from each other, therefore perpendicular to each other in the EM wave.

1. Open, close, ajar
   Black, white, gray
2. Hertz, joule, kilo
   Amplitude, wavelength, frequency

EM waves have three distinct characteristics. They are identified as the amplitude, wavelength and frequency.

1. Yes
   No
2. Only during nighttime.
   Depending on the geographic location.

EMR doesn't need to be bounced off or reflected to be felt or heard. It can travel very well through empty spaces, actually.

1. Crest
   Ending
2. Topography
   Valley

The crest or peak refers to the top portion curve of a wave. It's important to distinguish that from the bottom curve, in relation to other aspects of EMR.

1. Flow
   Trough
2. Spores
   Cavity

The bottom part of a wave is called the trough. Its measurement in conjunction with the crest will be relevant when looking at certain aspects of EMR.

1. Chamber
   Air
2. Light
   Rockets

EMR basically travels at the speed of light. That's why light comes into play when discussing EMR.

1. Range of frequencies and wavelengths.
   Its ancestor.
2. The creative interpretation of images.
   Malicious implication of a crime.

EMR basically has a range, and it is formally known as the electromagnetic spectrum. This spectrum generally has about seven different regions with varying readings of frequencies and wavelengths.

1. Wave crests
   Nose to toe
2. Lines
   Points

To completely measure a wavelength, we have to consider the crest to crest distance. That is considered as one full cycle in terms of its regular fluctuation or oscillation.

1. DNA
   Bicarbonate
2. Sodium
   Photon

A photon is a light particle. It's in the very essence of the electromagnetic field, and of course EMR as well.

1. X-rays
   Ambulance
2. Stethoscope
   Hospitals

X-rays are considered as one of the regions of the EM spectrum. It's actually X-radiation, considered as a form of EMR.

1. Nods per beat
   Tweaks of particles
2. Number of waves
   Splices of light

Frequency is about counting the number of waves formed in a specific time frame. The changing time variant could result in either high frequency or low frequency.

1. Liters
   Kilometer
2. Hertz
   Miles

Frequency is measured via wave cycles produced per second, with the unit of measurement being the hertz. We shorten it as Hz.

1. Baking plate
   Knives
2. LPG
   Microwave

Microwaves for heating up food are located within the seven EMR regions. Its specific range is versatile, though, as it could be applied to cooking needs or communication needs.

1. Pythagorean Theorem
   Occam's Razor
2. Wave-particle duality
   Nash Equilibrium

The wave-particle duality simply explains that light's given nature could possibly be both in wave form or particle form. They believed before that it's just one or the other.

1. Cliff notes
   Memos
2. Annotations
   Equations

Maxwell's equations were formulated to help understand EMR better, and classical electromagnetism in general. It's also the basis for electric circuits.

1. High definition
   Radio waves
2. Nonlinear editing
   Topographic study

All kinds of broadcast media use radio waves for our entertainment pleasure. It's also used in telecommunications.

1. Sinking
   Swimming
2. Duplicating
   Scattering

Arthur Holly Compton was responsible for identifying what is known now as the Compton effect. It's about how the photons scatter due to a charged particle, which results in decreasing its energy.

1. Andes
   Visible light
2. Sierra Madre
   HMI

Visible light is the shortest range or region in the EM spectrum. But it's the one visible to the human eye, without any equipment to aid us.

1. Vermilion
   Lambert
2. Infrared
   Epsilon

Infrared is invisible to us in general. But if you're exposed to it and it intensifies, you can actually feel it.

1. GHZ and MHZ
   CHR and FLR
2. VHF and UHF
   ABC and CBS

VHF and UHF mean very high frequency and ultra-high frequency. Practically speaking, this applies to the kinds of TV channels a regular TV antenna could capture -- and this is what we usually call "free TV."

1. Beta rays
   Theta rays
2. Omega rays
   Gamma rays

Gamma rays are actually useful for humans when used under great control. They have practical applications in the medical field and in photography.

1. The rainbow
   A unicorn
2. Shadows
   Fog

Each color of the rainbow has a wavelength, and they vary from each other. This is the reason why we see different colors.

1. Ultraviolet
   Hydra
2. Pigmentation
   Vitiligo

Ultraviolet light is the harmful component of the sun's rays, that's why we protect ourselves from it. But it has its good uses, too, if harnessed properly.

1. Thesis and synthesis
   Context and subtext
2. Noise and feedback
   Constructive and destructive

In wave relationships, either there is constructive interference or destructive interference. The former refers to the waves being in phase with each other, while the latter is about negating each other.

1. Ionizing and non-ionizing radiation
   Light and dark
2. Gluta and thione
   Scrape and spare

EMR's intense or not-too-intense radiation could be classified as ionizing or non-ionizing. X-rays are an example of the former while radio waves are an example of the latter.

1. Herbology
   Genealogy
2. Deforestation
   Bioelectromagnetics

Bioelectromagnetics experts should tell us how EMR affects us in a good way or a bad way. They study how we could be safe from these kinds of radiation ranges.

1. Lines
   Bands
2. Taxation
   Business permits

Radio bands are officially assigned by a governing body to avoid criss-crossing signals and frequencies with each other. Imagine the broadcast chaos if it weren't the case!

1. Its effectiveness
   its dangerous side effects.
2. How it interacts with specific matter.
   How it can travel through space.

EMR ranges vary in effect due to how each interacts with matter. Radio waves and gamma rays, for instance, affect matter differently, much like how visible light does.