Please solve the missing questions 23. The wavelength (in nm) of the spectral li

Question

Please solve the missing questions

23. The wavelength (in nm) of the spectral line of a hydrogen atom associated with the transition from the n = 3 to the n = 2 state is ap- proximately a) 410 b) 434 c) 486 d) 656 e) 734 24, You have a diffraction grating that has N = 4900 lines. The width of the grating is 4.2 cm. The angular separation (in degrees) between two lines in the sodium spectrum with = 588.995 nm and 2-528.592 nm in the first order spectrum is of the order of a) b) c) d) e) 41 4.1×10-4 4.1×10-1 4.1 4.1×10-2 25, Sodium! light (A = 589 nm) falls on a slit of width 0.482 mm. The angle (in degrees) at which the first minimum occurs is roughly equal to a) 7x10-6 b) 7 x 10- e) 7×10-4 d) 7×10-3 e) 7 x 10

Explanation / Answer

12) speed = lambda *f = 2*0.50*1000 = 1000 m/s

T = v^2 *u = 1000^2 *20e-5

= 200 N

Option d is correct

13) wavelength = v/f = 3e8/150e6 = 2m

Option B is correct.

14) Emax = v*Bmax = 3e8*3.33e-6

=1000 N/C in y direction as it is perpendicular to magnetic field and direction of propagation.

Option c is correct.

15) EM waves are longitudinal, not transverse.

So a is wrong

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