The students at this time were much more studious than the students of later generations, and they not only kept a new mind, but also had a mind that wanted to enrich the spiritual world. Baidu search literature network, more good free reading.

There will definitely be poor students, and there are those who can't learn, but when they see that the dogs in the same village are so studious, coupled with the supervision of their relatives at home, they also settle down and study seriously.

What's more, the college also has a generous scholarship, with which the family can live a happy life without working for a year.

They are competing to learn, and they all want to be the first person in the college, and under the supervision of Yin Zhiming, the teaching director, and the guidance of various teachers, there is no intrigue in the college, there is just a good learning atmosphere.

When Ding Yi arrived, the students were already on the bench and looked at Ding Yi expectantly.

"Good dean" Yin Zhiming is also worthy of being a shrewd person, and this pomp and circumstance is also arranged enough, no more, no less

As soon as Ding heard this deafening "Hello Dean", the whole person smiled.

"Classmates, sit down" This feeling is really fascinating, and he finally realized Li Er's feeling of being lost

"Today, the Dean would like to give special praise to one person, and that is the leader of our physics group, Li Tai."

"He made something at the graduate school, and it was this thing that led to this open class."

"Classmate Li Tai, tell me what you found" Ding Yi beckoned to Li Tai, he was Li Tai's dean in the academy, and he would not care about his status as a prince. And this is also to motivate Li Tai, didn't you see that the little fat man was not good after knowing that Ding Yi knew what he had made

Li Tai was slightly stunned, and then walked on stage with a telescope, he Li Host Tai will not have stage fright

The students also looked at the little fat man with a look of surprise, which satisfied Li Tai's little vanity, Bentai was still powerful

"Hello fellow students, I'm Li Tai. Baidu search literature network, more good free reading. ”

This applause is a tradition of the college, and it seems that the specific origin is proposed by some unscrupulous dean. However, this applause can indeed express some meaning, and it is also widely used by students.

"Everyone knows that I'm the head of the physics group, and these days we're in the lab of the institute trying to make something that can be observed."

"It's just that I was stupid and didn't succeed."

"In my spare time, I picked up two pieces of glass that had been ground by craftsmen. And it's these two pieces of glass that have this thing in my hand telescope."

"As its name suggests, with it you can see farther and see things you couldn't see before"

The teachers and students were shocked

At the same time, I was confused, what is this?

"This is the process by which I discovered the telescope, but when I showed it to the dean, the dean said its name, and let us gather here to listen to him talk about the principle of the telescope" Li Tai had already guessed what Ding Yi was going to say, so he also said it for Ding Yi, which was regarded as revenge for being hit by someone.

Papapai Li Tai exited.

"Okay, today I'm going to talk to you about light."

"Why can we see clearly where there is a sun or a candle?"

"It's because of the light"

"Can anyone tell me why I can't see my fingers" The classroom should focus on interaction and arouse the interest of students.

No, there are people in the audience who are eager to try

"Qin Huaidao, you talk about it"

"It's because I didn't light a candle"

"Sit down"

"Dog, you talk about it"

A student pointed to himself incredulously, "Did the dean just call himself, does the dean know my name?"

"It's because there is no light"

"That's right, because you see the sun."

The students looked up at the sun hanging in the sky, and some did not understand.

"The sun is a big ball of fire, that is, it illuminates the place where we live, it illuminates the whole world"

What is the sun is a big fireball The students have been discussing, and the dean always has some amazing ideas, which have been proven right afterwards, is it possible that the sun is really a big fireball

"Today we are not talking about the sun, but about the light," Ding Yi patted the desk, stabilizing the order of the class.

"Look, it's the sun, and the light it emits hits the ground, so we can see things clearly." Ding drew a barbed circle on the blackboard behind him repeatedly.

"Why is there a shadow?"

"It's because something blocks the light, and the place where the light doesn't shine becomes a shadow instead of someone's soul" This kind of thinking is unacceptable, Ding Yi wants a group of atheists, a group of talents who want to explore the unknown, not mediocrity who attribute all the unknown to the gods.

"Dean, why is that shadow shorter than the meeting?"

Wow, this kid has an idea, and he can ask this kind of question

"Here, look at the blackboard"

"We, for example, this is the sun, this is the people. And the light from the sun shines on the person, and the person blocks the light, then the place behind him has no light, and it becomes a shadow."

"You can go down and study this for yourself."

"Today we're going to talk about light"

"Anything that emits light, we call them a light source. And the light it emits, we call it light. ”

"The light is all in a straight line, just like this" Two straight lines appeared on the blackboard.

"Of course, there are so many rays of light that we can't count them, so here we use these two to represent the edges of the rays."

"And these two straight lines are filled with light, and use your imagination, and these rays are so scattered that we can concentrate them, or spread them more together."

The students scratched their ears and cheeks, and after nearly a year of study, they are no longer the ignorant children they were at the beginning, and their way of thinking has also changed a lot.

Light sources, lights, shadows

These puzzles filled their minds, and then they suddenly realized that it seemed to be the case

If it's cloudy at night, it's dark outside, and you really can't see your fingers. If you have a torch or a candle, you can really see things

It's just that the light is concentrated or dispersed, how can this be done in such a thing as light, you can't see it but you can't touch it, how can you do it?

"The dean said that I can see things clearly because of the light, so I can see things in the distance with a telescope, is it because of the light?" asked Li Tai, today's class is really interesting.

"Haha, Li Tai is very good at thinking, yes, in fact, we can see far away, but because of the limitation of our eyes, we can't see clearly when we are far away."

"So, we need something to collect or disperse the light from afar. This way, you can see farther away, and even the stars in the sky will be clearly visible to you."