[Bored chemist]

It sounds more like undefined or indeterminate.

To whom?

What are the necessary conditions for a light beam to produce cooling effect on an object it's shone on?

They are the conditions which people arrange when  they wish to perform laser cooling experiments.
If you see how they do those experiments, you should be able to work out what the conditions are.

I'll try to figure it out through experiments when I have the time.

I'm not expecting you to do experiments; I'm hoping you will think.

[hamdani yusuf (OP)]

It sounds more like undefined or indeterminate.

To whom?

To anyone who wants to understand how temperature emerges from microscopic interactions.

[hamdani yusuf (OP)]

They are the conditions which people arrange when  they wish to perform laser cooling experiments.
If you see how they do those experiments, you should be able to work out what the conditions are.

Do you know?  What are they?

[Bored chemist]

Do you know? 

Yes.
That's why I can tell you that you don't need a laser.

What are they?

I'm hoping you will think.

[hamdani yusuf (OP)]

Do you know?

Yes.
That's why I can tell you that you don't need a laser.

What are they?

I'm hoping you will think.

It makes your "knowledge" unfalsifiable, hence unscientific.

[Bored chemist]

It makes your "knowledge" unfalsifiable, hence unscientific.

How  did you come to that odd conclusion?

Me telling you to look something up rather than spoon-feeding you the information doesn't make it unscientific; it makes it educational.
I'm hoping that you will become accustomed to thinking for yourself.

[hamdani yusuf (OP)]

It makes your "knowledge" unfalsifiable, hence unscientific.

How  did you come to that odd conclusion?

Me telling you to look something up rather than spoon-feeding you the information doesn't make it unscientific; it makes it educational.
I'm hoping that you will become accustomed to thinking for yourself.

By not specifying your knowledge, you protect yourself from being contradicted by experimental results.

[Bored chemist]

By not specifying your knowledge, you protect yourself from being contradicted by experimental results.

My knowledge is generally based on experimental results so your idea makes no sense, does it?
How could the experiments contradict themselves?

[hamdani yusuf (OP)]

By not specifying your knowledge, you protect yourself from being contradicted by experimental results.

My knowledge is generally based on experimental results so your idea makes no sense, does it?
How could the experiments contradict themselves?

You can't contradict anything which is not specified.

[Bored chemist]

You can't contradict anything which is not specified.

Nobody said that you could.

[hamdani yusuf (OP)]

By not specifying your knowledge, you protect yourself from being contradicted by experimental results.

My knowledge is generally based on experimental results so your idea makes no sense, does it?
How could the experiments contradict themselves?

One experimental results might be interpreted by several different theories. You didn't specify which theory you accept.

It makes your "knowledge" unfalsifiable, hence unscientific.

How  did you come to that odd conclusion?

Me telling you to look something up rather than spoon-feeding you the information doesn't make it unscientific; it makes it educational.
I'm hoping that you will become accustomed to thinking for yourself.

You don't always agree with Google nor Wikipedia. How do we know which one is the correct answer? Do you think you're always right?

[Bored chemist]

Do you think you're always right?

No

How do we know which one is the correct answer?

It is difficult to be sure you have the right answer.
But it is often quite easy to identify wrong answers.
For example, an answer that contradicts itself is wrong.
An answer that contradicts an observation is wrong.
That's true, even if the observation was made a long time ago.

[hamdani yusuf (OP)]

How could the experiments contradict themselves?

If an experiment is not repeatable, then there must be some uncontrolled factors involved.

[hamdani yusuf (OP)]

This video gives important information to learn about temperature. 

[Bored chemist]

This video gives important information to learn about temperature superconductors.

[hamdani yusuf (OP)]

This video gives important information to learn about temperature superconductors.

Can't you see its relationship with temperature?

[Bored chemist]

Can't you see its relationship with temperature?

Practically the whole of thermodynamics was sorted out before thee were any high temperature superconductors to play with.

[hamdani yusuf (OP)]

Can't you see its relationship with temperature?

Practically the whole of thermodynamics was sorted out before thee were any high temperature superconductors to play with.

If two thermometers show different measurements from the same object at the same time, how to determine which one is more correct?

[Bored chemist]

The first stage is where you find something of which the temperature is known, and see which thermometer measures that correctly.

[alancalverd]

If two thermometers show different measurements from the same object at the same time, how to determine which one is more correct?

The one traceable to a national standards laboratory.

True story. I attended the induction of recruits to the UK National Physical Laboratory. The Director said: "How long is a piece of string? In law, it is as long as I say it is. Your job is to tell me what to say."