What are X - rays & their importance ?5 Ways technology is impacting current education system - Top Level Learning

What are X - rays & their importance ?5 Ways technology is impacting current education system

In physics, electromagnetic radiation (EMR) refers to the waves of the electromagnetic field which carries electromagnetic radiant energy. It includes some waves like., radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. X-ray is one of them.

X-rays have much higher energy which can pass through most objects including the body and much shorter wavelengths than ultraviolet light. X-rays have very short wavelengths between 0.03 and 3 nanometers, so small than a single atom of many elements.

PROPERTIES OF X - RAYS :-

●These rays are electromagnetic in nature.

●X-rays travels In straight line.

●Speed of X-rays is equal to speed of light.

●X-rays shows photoelectric effect.

●X-rays are used in surgery, radio therapy, engineering department and searching.

◆The intensity and the penetrating power of X-rays can be controlled independently.

X- RAYS ARE USED FOR :-

●X-ray creates pictures of the inside of your body.

●Medical x-rays are used to generate images of tissues and structures inside the body.

●The most familiar use of check of x-rays is for broken bones, but x-rays are also used in other ways.

DISADVANTAGES OF X - RAYS :-

●While X-rays are slightly increased risk of cancer, it is an extremely low risk of short-term side effects.

●Exposure to high radiation levels of X- ray can cause various effects, such as vomiting, bleeding, fainting, hair loss, and the loss of skin and hair.

Best Essay on Noise Pollution And Its Causes

Best Essay on Noise Pollution And Its Causes

Noise pollution…. As is known by the name, the pollution that occurs through sound. Not only in India, but the whole world is in the grip of this pollution.Noise pollution generally means excessive noise.

The sound or noise that troubles humans and animals. Increasing population, transport vehicles in the number of thousands on the roads, factory / factory are all examples of noise pollution.

If the intensity of sound becomes very high, then it can also destroy the ability of any human to hear.

Although this pollution is less harmful than air, water and soil pollution, but there is a need to be cautious to solve it.

SOURCES OF NOISE POLLUTION

1). Traffic mode:

The means of transport are more in the cities than in the village. Trains, metro, trucks, buses, motorcycles, etc. all make noise when they are moving and when they play the horn, there is a lot of sound.

This noisy environment is the highest in cities and this is the reason why air pollution is more along with noise pollution.

2). Industry:

Machines in small and big factories, turbines and boilers etc. generate a lot of noise.

These factories operate continuously for 24 hours and continuously produce sound.

This is the most important cause of noise pollution, which has an effect on people working in cities as well as all around.

Read more:-
● राज्य के 55+ योजनाएं
● 11 most important event of the world

3). Noise Pollution by Entertainment:

DJ, TV, radio etc. These are all means of entertainment of human beings, but the loud sounds emanating from them promotes noise pollution.

Now-a-days people are getting married in wedding parties System, affecting all the people and animals around it.

Too loud a sound can also cause a heart attack.

4). Fireworks:

There are many such festivals in India, when people use fireworks in their homes. People burn big firecrackers at Diwali, Christmas, fairs and weddings, which along with polluting the air, create a very loud noise and damage the environment.

5). Construction work:

If you see the construction work, it can be seen in many places in the cities. Used big machines for road construction, construction of house, office etc.

This produces a very intense sound, which is intrinsically harmful to people and animals standing nearby.

CONCLUSION

This is a subject for which it is necessary to create awareness among people along with contemplation. Those people who do not know anything about its consequences, it is necessary to train such people.

The government cannot do as much as it wants to do in this matter. Until the public will not see the seriousness of it, and will implement it themselves, then only its diagnosis is possible.

7 Surprising Things About the Universe -Top Level Learning

7 Surprising Things About the Universe

7 Surprising Things About the Universe

1. How do we define our Universe- 

Our Universe is a vast expanse of space, which contains everything that exists.

It is so huge (possibly infinite in volume) that we can say that it is almost entirely empty, with small chunks of physical matter and energy - which comprise of all that is in existence.

2. When and how was the Universe born- 

how was universe born

The Universe was born approximately 14 billion years ago, in a massive explosion now called The Big Bang.

The explosion took place in just a fraction of a second and released radiation, particles and clouds of atoms, which gradually formed into stars and galaxies.

यह भी पढ़े:- ई-बैंकिंग क्या है? ई-बैंकिंग के प्रकार और ई-बैंकिंग खाता

3. What were the different stages in the formation of the Universe-

Just after the Big Bang, all matter was squeezed into a tiny fireball, even smaller than an atom .

Slowly, as the fireball expanded and began to cool, the tiny particles of energy and matter formed a thick, soup-like material.

Gravity pulled the parties together and atoms joined to as gases,such as hydrogen and helium.

 The gases clumped into clouds and the soup' thinned out as the young Universe grew larger.

After some several hundred million years, the clouds began to form stars and galaxies.

4. How much Universe is big -  

how much Universe is big

No one knows that the Universe is infinitely large, or even if ours is the only universe that exists in the galaxy.

However, scientists believe that the Universe is at least 156 billion light-years wide.

They also believe that most of the matter in the entire Universe is invisible, and they call it 'dark matter'.

The observable is spread over a space at least 93 billions light years across.

5. What is a light-year- 

What is light year

Light year means that a light travel in a vacuum in 1 years. 5.88 trillion miles or 9.46 trillion kilometers distance travel in 1 year.

6.  Is the Universe expanding  - 

Yes! In the 1920s, American astronomer, Edwin Hubble made an observation that the Universe is continuously expanding, with all the galaxies rushing away from each other.

Astronomers do not know if this will go on forever. If it stops and the Universe starts to contract, the galaxies would rush towards each other.

Then, the Universe might br end in a Big Crunch,like that the opposite of the Big Bang.

This might set off another Big Bang and a brand make new Universe!

7. What is Cosmic Microwave Background radiation- 

The Cosmic Microwave Background (CMB) radiation is believed to be an effect of leftover light from the Big Bang.

These are minute temperature variations that are linked to slight density variations in the early Universe.

This faint glow fills the Universe and can be observed today with an average temperature of about 2.725 Kelvin.

The CMB radiation which believed to have given rise to the structures that populate the Universe today: clusters of galaxies, as well as vast, empty regions, was detected by two American radio astronomers - Arno Penzias and Robert Wilson - in the mid-1960s.