00:00Solid laser is a gas laser and liquid laser
00:09Now my brother, my brother, my brother
00:11What is this?
00:13In this example, ruby laser is a semiconductor laser
00:17In this example, helium-nune is a mixture laser
00:20and carbon-maxed laser
00:22and in liquid laser, methanol plus dye laser
00:25This is a very important topic of laser
00:38Light amplification by simulated emission of radiation
00:43What is this?
00:46Light is a monochromatic
00:49Unidirectional
00:52The third is coherent
00:55The fourth is sharply focused
00:57The fifth is highly polarized
00:59The fifth is highly polarized
01:01Up, up, up
01:03This is a state which we call meta-stable state
01:07High energy level in which electron can stay for long time
01:12Long time means 10 power minus 10
01:16I will not explain
01:18Long time instead of short time
01:19What is this?
01:20It will be a short time
01:21It will be 10 manfeel seconds
01:23Electrons when haiay in the ground
01:25다는 excited states
01:26updated
01:39uch mcs
01:41Now, how does this happen?
01:45This is because of optical pumping.
01:47Optical pumping is the process of providing energy to initiate and maintain the process.
01:52This means that energy is bigger.
01:54What does this mean? Metastable state. Metastable state.
01:57Metastable state.
01:58It will take a long time.
02:00What is this work?
02:03Population is inversion.
02:05Population means that it is inverse.
02:08It will take a long time.
02:11The situation in which the number of excited atom exceeds the number of atoms in the ground.
02:17The excited atom will be more.
02:20The diagram will take a long time.
02:22In the ground, the excited atom will be more.
02:24This will be optical pumping.
02:26In this result, the phenomenon of laser produces.
02:29Now, there is another thing.
02:32When simulated photon passes by an excited stream,
02:35it stimulates it to radiate photon of same energy
02:40by going to ground state by the principle of resonance.
02:44This means that all the work is principle of resonance.
02:46Then, it is a small thing.
02:48This is a big thing.
02:49Population, inversion, optical pumping and metastable state.
02:52Three big things.
02:54What is stimulated emulation?
02:57The incited photon induces the atom to decay
03:00by emitting a photon that travels in the direction of incident photon.
03:05Coherence, simulated photon have same frequency and wavelength.
03:10If you have a question,
03:12then you will see that
03:13one n is 3 and one n is 6.
03:17Then, we will do n1, n2.
03:19If you have a question,
03:20let us know the radius of the radius.
03:22Then, the radius of the radius,
03:23we will do n2, n2, n2, n2, n2, n2, n2, n2, n2, n2.
03:26If you want groups vector on thekliches,
03:34write it on the radius of the radius
03:37and you will compare the radius.
03:41If you have a question,
03:42then the radius is the surrounding Arrived layering.
03:50Let us try to count calledlen administrations
03:52and now we're talking about baht from refresh.
03:55What is the problem?
03:57The problem is that the radius of the Lyman and Bracket of Radius is not going to tell us what happens.
04:03Lyman and Bracket of Radius is not going to tell us.
04:05Now look at Lyman and Bracket of Radius.
04:09Now what is the formula for Radius?
04:11It is directly proportional.
04:14This is one square and this is four square.
04:18Now one square is one and four square is 16.
04:21So what is the radius of the Lyman and Bracket of Radius?
04:25One is to sixty.
04:27Tomorrow we will tell you that the radius of the velocity.
04:30Tell us.
04:31Velocity, Velocity, Velocity, G.
04:33Inversely proportional to H.
04:36Now look, the obvious thing is that this is one and this is four.
04:41So this is one and four.
04:42What will happen?
04:43Four is to one.
04:44How is this?
04:45Because it is inverse.
04:47So if the velocity of Lyman and Bracket of Radius is 4,
04:50there will be the negative for the voltage.
04:51Now the next ratio of the energy.
04:54This is not only with the radius of Radius,
04:59but with the radius of Radius of Radius.
05:00So without that, 1 is to 4.
05:01What will happen?
05:025 is squared to 1 squared.
05:0416 is to 1.
05:05And this is your answer.
05:07Energy equals to minus 13.6 electron volts,
05:11upon N1 squared.
05:12Now if N1 is equal to 2.
05:15W2 is 13.6 divided by 2 is 4, which is 3.4.
05:19What calculation is that?
05:21Yes, I will tell you where the tricks are.
05:23Like N1 is 3.
05:25Now the division is very important.
05:26But let's take a little trick.
05:2813.6 divided by 9 is 9.
05:309 is why?
05:30Because it is 3.9.
05:32Okay, in other words, we will say that
05:33we don't have energy value in the paston series.
05:36The paston means that we will have value in the paston.
05:40Now look, what is 9.5?
05:424.5.
05:439 and 4.5 pluss, how much is it?
05:4513.5.
05:46For many of us, if we look at 13.5,
05:49then answer is 1.5.
05:50But 13.5 is a little more.
05:53So answer is 1.5 is a little more.
05:551.5 and 1.5 to 1.5.
05:57And we can give approximately 1.5 to 1.5.
06:00Okay?
06:00So, let's take a look.
06:03Velocity of formula is 2.18 into 10.
06:07It's upon N1.
06:08Electron and shell.
06:10Now let's take a look.
06:11Masker ruler constant is proportional to proportionality.
06:14We also say that radius is directly proportional to N squared.
06:19Radius is directly proportional to N squared.
06:23So, look at velocity.
06:25Velocity is inversely proportional to N squared.
06:27Now, energy is equal to N squared.
06:30Now, energy is equal to N squared.
06:32On N squared.
06:33Up, up, up.
06:34Now, up.
06:35Up, up.
06:36It's a great thing.
06:37The value of use.
06:39I will do numerical.
06:40We can say this.
06:42Energy is inversely proportional to N squared.
06:45To N squared.
06:46We can say this.
06:47The value of 100% is correct.
06:49Now, there are many dangerous questions.
06:51We have to take a look.
06:52Now, look.
06:53R is equal to N squared.
06:55N squared 0.529 amstrong.
06:57What is this?
06:58What is this?
06:59Radius of N.
07:00Bore, brother.
07:01There was a lot of work.
07:02There was a lot of work.
07:03There was a lot of work.
07:04There was no more work.
07:05There was no more work.
07:06Numerical, we have to take this approximately N squared 0.53 amstrong.
07:09Now, I gave NQ value 2.
07:11Now, I gave NQ value 2.
07:12Or, we can say that it is Palmer series.
07:14Palmer series will come and we will know what will be NQ value.
07:18It will be 2.
07:19It will be 3.
07:20It will be 3.
07:21It will be 4.
07:22It will be 5.
07:23Now, my brother, 2 square is 4.
07:25Now, I will take the decimal of the multiplication.
07:27I will take medical or I will take my technique.
07:29I will take 21.
07:31I will take 20 plus 1.
07:32I will take 50.
07:33I will take 50 plus 1.
07:34I will take 50 plus 1.
07:36I will take 50.
07:37If you take 50, I will take 50.
07:38So, you can take 0.53 and 0.53.
07:41If you take 4 to 0.53, we will take 2.
07:44If you take 4 to 0.53, we will take 2.
07:46If you take 4 to 0.53, we will take 2.12 amstrong.
07:48This is the radius.
07:49Now, 1 amstrong is equal to 10k minus 1 nanometer.
07:5310k minus 7 mm.
07:5510k minus 8 cm.
07:5710k minus 10 meter.
07:5810k minus 10 meter.
07:5910k minus 4 micrometer.
08:01Longest wavelength.
08:02What formula is this?
08:05N1 square, N2 square.
08:08RH divided by N1 plus N2.
08:10But, remember.
08:12Longest wavelength.
08:13N2 value is N1 plus 1.
08:15So, N1 value is 6.
08:17Now, what does this mean?
08:19What does this mean?
08:20This means that in alignment,
08:21we all know that N1 value is 1.
08:23So, N2 is 2.
08:24It is 6.
08:25In Parmer, N1 is 2.
08:27N2 is 3.
08:28N2 is 3.
08:29Pestant, N1 is 3.
08:30N2 is 4.
08:31N2 is 4.
08:32Bragant, N1 is 4.
08:33N2 is 5.
08:34N2 is 5.
08:35N2 is 5.
08:36N2 is 6.
08:37Very, very important.
08:39Now, how does it go?
08:42I am going to tell you that it is 91.2 nanometer.
08:47N1 N2 square divided by N1 plus N2.
08:51If this value is difficult to do the calculator,
08:53I will tell you that the calculator is not allowed.
08:56Remember that the last question comes from N1.
08:59Longest Lyman is 121.9
09:02Palmer is 6.6
09:04Peston is 1875
09:06Bracket is 4053
09:08Buffon is 7461
09:10It is a very important topic.
09:12In this case, we also come to the shortest wavelength.
09:15Then what will happen?
09:17In the shortest wavelength,
09:19we take N2 to infinity.
09:21So,
09:23N2 to infinity,
09:25So,
09:27N1 square upon RH
09:29Red bar constant
09:31Now,
09:321 upon RH is 91.2 nanometer
09:35For the shortest wavelength,
09:37we use the formula
09:39multiply by N1 square.
09:42Now, what is N1 square?
09:44If it is Lyman,
09:45it will be N1 square.
09:46Palmer,
09:47it will be N2 square.
09:48If it is Peston,
09:49it will be N1 square.
09:50It will be N3 square.
09:51Bracket is 4 square.
09:52Buffon is 5 square.
09:53Now,
09:54multiply it from 91.2 nanometer.
09:57Now,
09:58you can see
09:59Look,
10:00multiplication view trick,
10:01there is no problem.
10:02But,
10:03there is also one way,
10:04which is very small.
10:05What values are the same?
10:06Look,
10:0791.2
10:08What are the values?
10:093,
10:1064.8,
10:118,
10:1220.8,
10:131,
10:144,
10:155,
10:169,
10:172,
10:182,
10:192,
10:204,
10:214,
10:222,
10:234,
10:244,
10:254,
10:264,
10:273,
10:282,
10:298,
10:300,
10:317,
10:321,
10:339
10:34away,
10:361,
10:42Yes,
10:445,
10:46N1,
10:471,
10:481,
10:501,
10:511,
10:521,
10:542,
10:560,
10:56259 is 225
10:59228
11:01Just this value
11:02And this value is also
11:03This value is 100
11:06Palmer 2 is 4
11:09And this value is 400
11:11And this value is 3
11:13And this value is 9
11:15So many ways
11:17Okay
11:18Laser topics
11:20I have IV
11:22MCQs
11:23Velocity of laser light is
11:26Less than ordinary light
11:28More than ordinary light
11:30Equal to ordinary light
11:33Reflective mirror in laser is used to
11:37Further stimulation
11:39For producing more energetic
11:41Further stimulation
11:43Okay
11:44In the production of laser beam
11:47For each incident photon
11:49We will have two photons
11:51Part 1 is in the same direction
11:53Part 2 is in the opposite direction
11:55At right angle to each other
11:56So this answer is in the same direction
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