Physics, 13.07.2019 22:20, bryantfoster

The irradiance for an ideal blackbody is given by the planck for where the symbols have their usual meaning and k represents boltzmann's constant with the value k 1.38x10 jk -8.62x10ev/k use a spreadsheet or some other program to graph this function for 3450k, and 5450k, objects over the wavelength range from10 to 3 μm. plot the radiance in m w/cm2/nm. 4. find a formula that allows you to calculate the wavelength corresponding to the maximunm irradiance for a blackbody. hint: find the condition for a maximum by changing variables according to x he/kt and using your knowledge of calculus. you should end up with an equation that puts conditions on x, e. g. fx) -0. use a numerical method, i. e. newton's method, to find a root of this nonlinear equation. plug the result into r he/akt and voila, you have a formula for the wavelength corresponding to the maximum irradiance for a blackbody. 5. in a 100 w incandescent light bulb the tungsten filament is at 3450k. what is the surface area of the filament?

Answers: 1

Show answers

Other questions on the subject: Physics

Physics, 21.06.2019 13:30, ryliepeloquinf

Now that the first three steps have been explained, identify the next three steps, in order. calculate the magnitude of r sum vector components calculate a and b magnitudes calculate the direction of r, calculate x, y components step 4 step 5 step 6

Answers: 2

continue

Physics, 21.06.2019 22:30, droidd133

Fft review: linspace, fs, fftshift, nfft 1. generate one second of a cosine of w,-10hz sampled at f, = 100hz and assign it to x. define a tt as your time axis 2. take 64 points fft. 3. as you remember, the dft (which the fft implements) computes n samples of s2t where k-0,1,2, n -1. plot the magnitude of this 64-points fft at range 0 to 63, what do you think of this graph? 4â·to get the x-axis into a hz-frequency form, plot this 64-points fft between-50 to 50 (the 100hz sampling rate) and have n-points between them. 5. according to your figure, what frequency is this cosine wave at? 6. remember that the fft is evaluating from 0 to 2ď€. we are used to viewing graphs from-ď€ to ď€. therefore, you need to shift your graph. 7. now according to your shifted graph. what frequency is this at? 8. note that the spikes have long drop-offs? try a 1024-point dft. note that the peak is closer to 10 and the drop-off is quicker. although, now sidelobes are an issue

Answers: 2

continue

Physics, 22.06.2019 00:00, boss1373

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Answers: 1

continue

Physics, 22.06.2019 07:00, shaffergabe10

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

Answers: 3

continue

Do you know the correct answer?

The irradiance for an ideal blackbody is given by the planck for where the symbols have their usual...