How does light travel? What is Light radiation?

How does light travel?

First of all, to learn how light travels,we most know what light is. We have been learning from our schools that, light is a kind of energy which gives the sensation of vision. It's true that due to light we see the things, light coming from the sun reflect from a particular thing and then return to our eye, then only we can recognize the object. So, broadly, what is light? Light is a wave and yes, light is also a particle. Light shows both wave and particle nature. Light is a transverse wave and according to Einstein, it contains photon as a particle or a quanta. As light is a wave, it is a source of energy. According to Planck's the energy of wave is given by,

EM Wave

E = hf

where,

h ---> Planck's Constant

f ---> frequency

So light is a form of energy. Albert Einstein and also Millikan's experiment proved that light consists of particle called photons. Photon is a particle that has no rest mass, meaning that it is always in motion. Photon also travels in a straight path with the light with the speed of 3 x 10^8 .

So, now let's move on to the question. So, how does light travel? light is a transverse wave as well as an electromagnetic wave and electromagnetic wave is the wave in which electric field and magnetic field propagate perpendicularly with each other in a forward direction. It means that neither electric field nor magnetic field disturb the path of light. So, light doesn't require a medium to travel. Light travels from the sun to the earth without the medium as there is vacuum in the space. Light is, moreover, a wave then merely a particle. So, with this we can conclude that light is a transverse wave and an electromagnetic wave which moves in a forward direction such that the electric field and magnetic field are always perpendicular to each other and direction of propagation is also a perpendicular to both the fields.

Comments

How to Remove Powered by Blogger – Attribution Widget?

In this article, I will be demonstrating how to remove or hide attribution widget ‘Powered by Blogger’ in footer of blogger blogspot blogs. Before going to the process, backup your blogger template , while editing html code if anything goes wrong or template modified design doesn’t work or looks good you can restore from backed up template. Here I have demonstrated you two methods for removing attribution widget. Some blogger templates may not support method 1 then you need to follow method 2 for successfully removing attribution widget. Method 1: Remove ‘Powered by Blogger’ by unlocking Attribution widget Step 1 : Go to your blog “Template” | click on “Edit HTML”. Step 2 : Here on drop-down “jump to widget” option and select Attribution 1 as shown below Step 3: After selecting Attribution 1 widget you will be able to see this line <b:widget id=’Attribution1′ locked=’true’ title=” type=’Attribution’> on your blogger template. Step 5: Once done click on...

What is a Country? देश भनेकाे के हाे?

Yesterday, on January 13, Nepal's Coat of Arms was updated to add Kalapani and Limpiyadhura as in the new Political map. In this context, we today discuss on what actually 'a country is for it's citizen.' देश भनेकाे के हाे? What is a Country? जनताका लागि देश के हो ? जनताका लागि देश संविधान, कानुन, नागरिकता, सिमाना र झन्डा मात्र हो ? होइन । जनताका लागि देश राजधानी, त्यसबीच ठडिएको दरबार र त्यसको गजुर हो ? होइन । जनताका लागि देश भनेको सरकार हो ? होइन । जनताका लागि देश निर्वाचन क्षेत्र मात्र हो ? हुँदै होइन । त्यसो भए जनताका लागि के हो त देश ? जनताका लागिदेश चार सिमानाभित्रको माटो मात्र होइन । योसँगै जोडिने भावना, प्रेम, ऊर्जा र सपनाहरूको बगैंचा हो । जनताका लागि देश आशा हो । जनताका लागि देश खेतमा झरेको पसिनाको बियाड हो । आन्दोलनहरूमा सडकमा पोखिएको रगत हो । आफ्ना सपनाहरूको कविता हो । जस्तो, एउटा शिशुका लागि आमाको काख । जस्तो, भर्खर हिँड्दै गरेको एउटा बालकका लागि पिताजीको हात । एउटा यात्रीका लागि देश बाटो हो, जसमाथि ऊ आफ्ना पैतालाका डोबहरू छोड्छ र गन्तव्यतिर बढ्छ । देश भनेको ...

Top 7 Modules in Python Programming language | 2020

Python is a simple programming language yet of very high level and is very much popular. This days the use of python has gone very high and it is expected to be much higher in the upcoming days in the near future. So, today in this article we will be discussing about some modules in python language which are most to be learnt: NumPy: It helps to do basic mathematical operations and complex math with algebraic formulas, statistical operations,etc. It is a valuable python package and is important for machine learning. Pendulum: It helps to do complex coding involving dates and time and is broad form of datetime module. It also manages the time zone automatically hence, it is a replacement for the datetime module. Python imaging library: It makes easy to write codes that involves to open, read and manipulate or modify images in a variety of formats. The Pillow or PIL imaging library is good for importing, manipulation and exporting images. MoviePy: As pillow is to images, moviePy ...

wanem guide

Search This Blog