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In the photoelectric effect; the greater the work functionthe greater the speed of an electronb) the easier an electron is releasedthe more strongly an electron is ...

Question

In the photoelectric effect; the greater the work functionthe greater the speed of an electronb) the easier an electron is releasedthe more strongly an electron is held to the metalnone of the above

In the photoelectric effect; the greater the work function the greater the speed of an electron b) the easier an electron is released the more strongly an electron is held to the metal none of the above



Answers

Photoelectric effect is the phenomenon in which (a) photons come out of a metal when it is hit by a beam of electrons (b) photons come out of the nucleus of an atom under the action of an electric field (c) electrons come out of a metal with a constant velocity which depends upon the frequency and intensity of incident light wave (d) electrons come out of a metal with different velocities not greater than a certain value which depends only on the frequency of the incident light wave and not on its intensity

Hello students in this question we have given that the photo electric effect support the quantum nature of light quantum nature of light because Okay, so we have to choose the correct option. So option A Sing. There is a minimum frequency of light below which photo electrons is not possible. That is the threshold frequency. So this option is correct. Okay, option B. The maximum kinetic energy of the photo electrons depends upon lee only upon the frequency of the light, not upon the intensity. So this is correct options. See even when the metal surfaces faintly illuminated the photo electrons leaves the surface immediately. So we can say here that there is no time lead. Okay, so hence this option is also correct. Now we can say here that all three options are correct. So it means option D. That is all of the above options are correct. So this is the this is why the photoelectric effect supports the quantum nature of the light. Okay thank you.

Mhm.

Goodbye Or two. Electric equation equation we have pass I am we Squire. That is the kinetic energy is equal to at sea Multiplied by one divided by λ -1 divided by Atlanta land or not. So this land or not has worked. This is the three shoulder wavelength and landed with length of the radiation so threshold we've landed the minimum radiation which must be required so that the electron can be ejected out from the metal surface on the metal surface. So now we want to find out the work function. So this equation can be further return EVs Hc divided by lambda is equal to work function w less half. I am the choir. So now solving for work function we will get at sea divided by lambda minus half. And we is quiet coding values given in the question Edge is the planks constant and the value for Plank. Plank's constant at 6.626 multiply 10 raised to power minus 34. Dual second divided by. So here we have also seen seen the speed of light three into 2 and rest in power E with us for a second divided by lambda. Lambda is 4000 and a strong. So this will be 4000 multiplied and raised the power. My understand matter minus half Mass of electron. M is the mass of electrons. So this will be nine Multiplied by it and raise. The government is 31 kg multiply velocity of the electron. So this will be six, multiplied by it and restore power five esquire. So this is given to us in the question. So solving work function will be equal to 3.35 Multiplied by it and restore power -19 jewels. So on converting into electron walls. So we will have, it is approximately will be called to Well .1 electron walls. Hence, see option will be collected.

So what function bar function of madam? That is hi is given by edge New North. So this is also called a threshold energy. And here you know is that he sure. In frequency reassured frequency. That is the minimum frequency which is required for that electron could release out of the electron of the metal. For the electronic could raise out of the metal and it can get to the medical face. So according to photo electronic photo electric equation we have half I am the this is a mass of electron the Squire. So this is what this is the formula for kinetic energy of electron. This kinetic energy of electron that is half mg Squire will be given by at New minus at New North. So or we can also write details half um mm. We Squire is equal to at sea divided by lambda minus. Sorry. So now yeah we have been given That Lambda that frequency is 4000 strong. There is 4000 multiply by 10. Rest of our minus 10. Later velocity the velocity is six. In too generous to power five with terrible second in wars little second animals. And the mass of the electron. We all know mass of electronics. nine nine multiply by multiply by And raise the bar -31 kg C. is the speed of light. That is three into. And it's the power eight winter second inverse edge is the plan constant. That is six 6 to 6 Multiplied and rest of power -34 two seconds. So putting all the all the values in the in this equation oh we will have half Multiply mass of electron that is nine multiplied and raise the power 9 20 flight and rest to power 31 minus 31 In two velocities choir 36 multiply bite and rest the power five Squire the equal to Now we will have at new at sea upon lambda putting the value for a seven lambda for edge that is playing constant. The value 6.626 six point 6 to 6 Multiply can raise to power -34 Multiplied three into terrorist. The power eight divided by 4000 While deployed, tends to power -10 minus side. So the value force I will be able to 1.62 When they apply 10 raised to cover -21 minus 4.96 multiply Dallas to power minus 19. So it will be called to 3.36 one deploy Can raise the Power -19. So now this value isn't true. So if we want to calculate we have to convert it into electron volt for electron wall There's a very big 2.1 electron one. Hence option C is correct option seen is I know


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