Question

i need 24 and 26 answered

LIL. ated electrons Broglie wave- of a proton's article probe? b) electrons, - have a de 24. Consider electrons of kinetic energy 6.0 eV and 600 keV. For each electron, find the de Broglie wave- length, particle speed, phase velocity (speed), and group velocity (speed). 25. A wave, propagating along the x direction according to Equation (5.18), has a maximum displacement of 4.0 cm at x = 0 and t = 0. The wave speed is 5.0 cm/s, and the wavelength is 7.0 cm. (a) What is the fre- quency? (b) What is the wave's amplitude at x = 10 cm and t = 13 s? 26. A wave of wavelength 4.0 cm has a wave speed of 4.2 cm/s. What is its (a) frequency, (b) period, (c) wave number, and (d) angular frequency? ons in equi- (b) 0.010 K across a po- vavelength, gy? ith kinetic d) 40 leV 97TH.. Y nun evin: -

Answer 1

2= 4 cm = 0.0um. v=4.2 cm/s = 0.042 m/s @ frequery = e = 0.042 If = 1.055 Bus period T = 1 = 7 or = 0.9525 T= 0.9525 Shes © care number K = 27 = 2x3 14 = 157 ml K = 187m' = 1:57 cm @ & Angule fregung w=27f = 2x3:14x 1.05 0.04 Iw=6.594 rad's de