Electromagnetic waves Topics Electromagnetic waves and their characteristics . Transverse nature of electromagnetic waves. Electromagnetic spectrum (microwaves, infrared, visible, radio waves, X-rays , ultraviolet, gamma rays). Applications of e.m. waves.
Table of Contents
What is electromagnetic radiation PPT?
Wave model โข In 1860 J C Maxwell conceptualized EMR as an electromagnetic energy or wave that travels through space at the speed of light โข Speed of light is 3 X 108 m/s โข Electromagnetic waves consists of two fluctuating fields-one is electric and other is magnetic.
What are the 7 types of waves of electromagnetic?
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Microwaves (like the ones used in microwave ovens) are a subsection of the radio wave segment of the EM spectrum.
What are the 10 practical applications of electromagnetic waves?
- Radio waves – radio and television.
- Microwaves – satellite communications and cooking food.
- Infrared – Electrical heaters, cooking food and infrared cameras.
- Visible light – Fibre optic communications.
- Ultraviolet – Energy efficient lamps, sun tanning.
- X-rays – Medical imaging and treatments.
What are 10 electromagnetic waves?
- Radio and Television.
- Microwave Ovens.
- Medical Examination.
- Sterilization.
- Communication Devices.
- RADAR.
- Military Equipment.
- Cancer Therapy.
What is the formula for electromagnetic waves?
If the frequency of oscillation of the charged particle is f, then it produces an electromagnetic wave with frequency f. The wavelength ฮป of this wave is given by ฮป = c/f. Electromagnetic waves transfer energy through space.
What are the 4 main properties of electromagnetic waves?
- transfer energy from one place to another;
- can be reflected;
- can be refracted .
What is the principle of electromagnetic radiation?
EM radiation is a form of energy propagation where photons with both particle and wavelike properties travel at the speed of light. EM waves carry energy and transfer their energy upon interaction with matter. The energy associated with EM radiation is proportional to frequency and inversely proportional to wavelength.
What are three properties of electromagnetic waves?
Like other waves, electromagnetic waves have properties of speed, wavelength, and frequency.
Which is the highest frequency?
Gamma rays have the highest frequency in the electromagnetic spectrum. They have a frequency of the order of about 1020 to 1022 Hz.
Which has longest wavelength?
Gamma rays have the longest wavelength. Gamma rays have the longest wavelength.
Why is it called electromagnetic waves?
In other words, EM waves are composed of oscillating magnetic and electric fields. Description: Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. They are hence known as ‘electromagnetic’ waves.
How are electromagnetic waves used in our daily life?
Everyday life is pervaded by artificially made electromagnetic radiation: food is heated in microwave ovens, airplanes are guided by radar waves, television sets receive electromagnetic waves transmitted by broadcasting stations, and infrared waves from heaters provide warmth.
What objects use electromagnetic waves?
When you listen to the radio, watch TV, or cook dinner in a microwave oven, you are using electromagnetic waves. Radio waves, television waves, and microwaves are all types of electromagnetic waves.
What is the importance of electromagnetic waves?
Electromagnetic waves are used to transmit long/short/FM wavelength radio waves, and TV/telephone/wireless signals or energies. They are also responsible for transmitting energy in the form of microwaves, infrared radiation (IR), visible light (VIS), ultraviolet light (UV), X-rays, and gamma rays.
What are the 7 increasing frequency?
The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays and gamma-rays.
What is the shortest wavelength?
Gamma rays have the shortest wavelength and the highest energy among the other waves in the electromagnetic spectrum. The wavelength of the gamma rays is less than 0.01 nanometers. Most of the gamma rays from space are blocked by the Earth’s atmosphere. Was this answer helpful?
What is the most important electromagnetic wave?
Electromagnetic waves are classified according to their frequency. The different types of waves have different uses and functions in our everyday lives. The most important of these is visible light, which enables us to see.
What is the speed of EM wave?
Electromagnetic radiation is a type of energy that is commonly known as light. Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum.
What is the frequency of a wave?
Wave frequency is the number of waves that pass a fixed point in a given amount of time. The SI unit for wave frequency is the hertz (Hz), where 1 hertz equals 1 wave passing a fixed point in 1 second.
What is the shape of an electromagnetic wave?
While all waves take different shapes, every electromagnetic wave that you’ll encounter has the same S-shaped (sine wave) curve as shown below. These are called transverse waves. You can measure these transverse waves in several ways: By Amplitude.
What are the 7 types of electromagnetic waves and their uses?
- Radio Waves: Instant Communication.
- Microwaves: Data and Heat.
- Infrared Waves: Invisible Heat.
- Visible Light Rays.
- Ultraviolet Waves: Energetic Light.
- X-rays: Penetrating Radiation.
- Gamma Rays: Nuclear Energy.
Which radiation has the highest energy?
Gamma rays have the highest energies and shortest wavelengths on the electromagnetic spectrum.
What is the nature of electromagnetic waves?
In an electromagnetic wave, electric and magnetic field vectors are perpendicular to each other and at the same time are perpendicular to the direction of propagation of the wave. This nature of electromagnetic wave is known as Transverse nature.
What are characteristics of electromagnetic radiation?
Two key points to remember about the characteristics of EM radiation (e.g., microwaves, X-rays, and gamma rays) are that EM radiation is not bits of matter, they are electromagnetic wave forms possessing no charge and no mass, and they can be characterized by frequency, wavelength, and velocity.