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  • It's AumSum Time.

  • Can you guess the title of my next video?

  • Hurry up.

  • Write your guess in the comments section below.

  • What is the big bang theory?

  • Many of us wonder how everything, that is humans, trees, planets, stars, galaxies, and even space and time came into existence.

  • How did our universe originate?

  • Now, there are several theories, beliefs and myths about the beginning of our universe.

  • However, the most widely accepted explanation is the big bang theory.

  • Which scientists use to describe the initial formation of our universe

  • It states that our universe began from a very hot and compressed point, which is also known as a singularity.

  • Based on estimations, it is said that approximately 13.7 or 13.8 billion years ago, the singularity violently exploded.

  • This explosion is called the big bang.

  • Scientists claim that from this explosion or big bang, space, time, energy, matter.

  • Then, stars, galaxies, humans, etc., came into existence.

  • Now, you must be wondering, what happened before the big bang at singularity?

  • It is said that at singularity, laws of physics and time did not exist.

  • If time did not exist, then there is no reference point to determine what happened before the big bang.

  • How can we smell things?

  • I don't have a nose.

  • So, how will I know?

  • At the back of our nose, there is a tissue called olfactory epithelium.

  • It is covered with mucus.

  • This tissue has specialized neurons called olfactory receptor neurons.

  • There are about 40 million olfactory receptor neurons.

  • These neurons are chemoreceptors, that is, neurons which detect chemicals.

  • They have a cool name.

  • Now, when any substance releases its smell or odor, the odor consists of chemicals.

  • When we breathe in, these chemicals enter our nose.

  • When they reach the olfactory epithelium, the chemicals get stuck in the mucus, causing them to activate the neurons.

  • As a result.

  • These activated neurons send signals through the olfactory tract to the brain, informing it about the smell.

  • Topic: Convex mirror.

  • Why is a convex mirror used as a rear-view mirror?

  • What an amazing car.

  • But your rear-view mirror is missing.

  • Don't use a concave mirror.

  • It will usually show you magnified images.

  • Why don't you listen to me?

  • See, I was correct.

  • Now put a convex mirror and see the result.

  • Look.

  • The image is much smaller, right?

  • Do you know what the difference between the 2 mirrors was?

  • If we use a concave mirror for our car, we will not be able to see the vehicles behind us properly.

  • This is because the concave mirror will magnify the object and we will see a very enlarged image.

  • Thus, we require a mirror which gives us a wider view of the vehicles behind us.

  • In this case, a convex mirror proves to be the right choice.

  • This is because a convex mirror forms a highly-diminished image, thus making the traffic look much smaller.

  • As a result, we can see a large number of vehicles in a very small mirror.

  • Why does helium make you sound funny?

  • Because helium converts you into a joker.

  • No.

  • Air mainly consists of gases such as nitrogen and oxygen.

  • It is present in our surroundings, lungs, mouth, nose, etc.

  • When we speak, air from our lungs passes through the vocal folds making them vibrate.

  • These vibrations make the air in our mouth and nose to vibrate back and forth, producing sound.

  • The speed of sound in air is about 340 meters per second.

  • My running speed is 500 meters per second.

  • Please listen.

  • Helium is lighter than nitrogen and oxygen.

  • Being lighter, sound travels faster in helium as compared to air.

  • Hence, when we inhale helium and try to speak, the sound produced travels faster, thus producing that funny voice.

  • Why do our teeth turn yellow?

  • Because our teeth need some color in their lives.

  • Our teeth basically consist of three parts.

  • The outermost part is enamel.

  • Enamel is white in color.

  • Beneath the enamel, there is dentine.

  • It is yellow in color.

  • Then comes the part called pulp, which has blood vessels and nerves.

  • Is this the same pulp found in our fruit juices?

  • No.

  • Please concentrate.

  • When we drink or eat acidic fruits and beverages like lemon, orange juice, soft drinks, etc.

  • They erode or wear away the enamel, exposing the yellow dentine and thus, making teeth appear yellow.

  • However, did you know that some people's teeth are naturally yellowish?

  • This is because in such people, the layer of enamel is thin causing the yellow color of the dentine to appear more clearly

  • Thus, making their teeth appear naturally yellow.

It's AumSum Time.

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什麼是大爆炸理論?| 我的天啊!我的天啊!我的天啊!我的天啊!我的天啊!我的天啊 (What is the Big Bang Theory? | #aumsum)

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    AumSum 發佈於 2021 年 01 月 14 日
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