Electromagnetic Wave

Question 1

Is a form of energy that humans encounter and utilize in day-to-day activities. It had only been associated with visible light until scientists discovered its other types, which differ in frequency and wavelength.

Answer 1

Electromagnetic Radiation

Question 2

Primarily comes from extremely hot astronomical objects such as the sun.

Answer 2

Electromagnetic Radiation

Question 3

Is energy that is emitted by accelerating charged particles that produce oscillating electric and magnetic fields. It travels through space or a material medium in the form of electromagnetic waves.

Answer 3

Electromagnetic Radiation

Question 4

The highest point of a transverse wave is the?

Answer 4

Crest

Question 5

The lowest point of a transverse wave is the?

Answer 5

Trough

Question 6

The maximum vertical displacement of the wave from its resting or equilibrium position is the?

Answer 6

Amplitude

Question 7

It is basically the height of the wave.

Answer 7

Amplitude

Question 8

The distance between two consecutive crests or troughs is the?

Answer 8

Wavelength

Question 9

Refers to one complete pattern of the wave, from crest to crest or from trough to trough, before the pattern begins again. Thus, the wavelength is the distance the wave travels to complete one cycle.

Answer 9

Wave Cycle

Question 10

Is the number of cycles that passes a specific point in a given time.

Answer 10

Frequency

Question 10

Frequency is commonly measured in hertz (Hz). Which is defined as one cycle per second. Hz is from?

Answer 10

Heinrich Hertz

Question 11

Is the time it takes for a wave cycle to complete. It is expressed in seconds (s).

Answer 11

period T

Question 12

Studied electromagnetic waves and calculated that their speed is identical to the speed of light.

Answer 12

Scottish Physicist James Clerk Maxwell

Question 13

Speed of Light?

Answer 13

3.0x10^8 m/s

Question 14

The seven regions of the electromagnetic spectrum are the?

Answer 14

Radio waves, microwaves, infrared radiation, visible light, ultraviolet (UV) radiation, X-rays, and gamma rays.

Question 14

Are produce by accelerating charges in conducting wires due to variation in current. It has the longest wavelengths and the lowest frequencies

Answer 14

Radio Waves

Question 14

Electromagnetic radiation encompasses a range of energies that has distinct wavelengths and frequencies known as the?

Answer 14

Electromagnetic Spectrum

Question 14

Cover a wide range of wavelengths that extends over several bands. They have the longest wavelengths, from a few meters to kilometers.

Answer 14

Radio Waves

Question 15

Had mathematically predicted the existence of radio waves in 1867.

Answer 15

James Clerk Maxwell

Question 16

Confirmed James Clerk Maxwell prediction in 1887.

Answer 16

German Physicist Heinrich Hertz (1857-1894)

Question 17

He sent and received the first transatlantic wireless message in 1901.

Answer 17

Italian Inventor Guglielmo Marconi (1874-1937)

Question 17

Guglielmo Marconi was awarded the Nobel Prize in Physics in 1909 for his work with the development of wireless telegraphy along with?

Answer 17

German Inventor and Physicist Karl Ferdinand Braun (1850-1918)

Question 17

Is facilitated by radio and TV transmitters. which operate on two basic transformations.

Answer 17

Transmission

Question 18

Are commonly used in communication.

Answer 18

Radio Waves

Question 19

The transmission and reception of radio waves rely on?

Answer 19

Oscillating Charges

Question 20

The conversion of electrical energy into electromagnetic energy in the antenna wire of transmitters.

Answer 20

Second

Question 21

Is the transformation of sound energy and light energy into electrical energy.

Answer 21

First

Question 22

Is a specially shaped crystal. When white light shines through it, the light is separated into all its colors.

Answer 22

Prism

Question 23

Are waves with frequency higher than those of radio waves. They are used in satellites communications, RADAR, Mobile phones, networks and for cooking.

Answer 23

Microwaves

Question 24

RADAR means?

Answer 24

Radio Detecting and Ranging

Question 25

Can be used in cooking and heating. The invention of it has reduced to one-fourth the usual cooking time as compared when using electric ovens.

Answer 25

Microwaves

Question 26

Have a shorter wavelength, from .001 m to 700 nm, and therefore, has a higher frequency.

Answer 26

Infrared Radiation

Question 26

The term infrared is a latin word in which infra means?

Answer 26

Below

Question 27

Infrared radiation in 1880 was discovered by?

Answer 27

Wilhelm Herschel

Question 28

Is the colour with the longest wavelength in the visible spectrum, therefore, it is known as infrared.

Answer 28

Red

Question 29

LASER means?

Answer 29

Light Amplifications by Stimulated Emission of Radiations

Question 29

Wavelengths range from 400 nm to 10 nm; the frequency (and therefore the energy) is high enough with UV rays to penetrate living cells and cause them damage.

Answer 29

Ultraviolet Light

Question 29

A year after Herschel discovered infrared radiation, he discovered ultraviolet (UV) light.

Answer 29

German Chemist Johann Wilhelm Ritter (1776-1810)

Question 29

Wavelengths range from 700 nm (red light) to 30 nm (violet light) with frequencies higher than infrared waves.

Answer 29

Visible Light

Question 29

Have short wavelengths with high frequencies. These rays have enough energy to penetrate deep into tissues and cause damage to cells; and stopped by dense materials, such as bone.

Answer 29

X-ray

Question 29

X-rays were discovered accidentally by?

Answer 29

German Physicist Wilhelm Roentgen (1845-1923) in 1895

Question 29

Can be harmful because they produce ionizing radiation, which can damage DNA and living tissue.

Answer 29

X-ray

Question 29

Can weaken bones, making them more likely to break.

Answer 29

Radiation

Question 29

When DNA is damaged by radiation, it can lead to?

Answer 29

Cancer or Death

Question 30

Carry the most energy and have the shortest wavelengths but have highest frequency.

Answer 30

Gamm Rays

Question 31

Forms of electromagnetic radiation, where radiation can be found?

Answer 31

Ultraviolet Light and X-rays