I need explanations to these two questions. The answer to the 1st one is more pr

Question

I need explanations to these two questions. The answer to the 1st one is more pronounce and the answer to the second one is 9, but I don't understand why. A clear explanation will get all the points. Be try to be clear as I'm trying to folllow your work.

Thanks in advance.

Question 1

Question 2

Suppose you lived in a world where the speed of light is equal to the speed of sound. Would the relativistic effects of length contraction and time dilation become: remain the same?A particle moves parallel to a SEPTA train parked on a straight level track. The speed v of the particle is such that (v/c f = 0.36 In the reference frame of the particle Which of the following causes the fringes in a double-slit interference apart?

Explanation / Answer

1. speed of light = 3e8 m/s

speed of sound = 340 m/s

if sound speed is also same asthat of spped o light, then we will be able to hear many no. of souds that are generated at place (far) fr0m us so life will become more prounced

2. In interfreence or diffraction pattern
the needed equation is Y = mLR/d---------------1
and d sin theta = mL--------------------2
where L = wavelgnth
m = order = 1,2,3,4, ......... for brigth bands
m = 1.5, 2.5, 3.5, 4.5, ......for dark bands
R is the distance from slit to screen
Y =- disatnce from central spot to nth order fringe or fringe width
so here now we apply

n0 of bright firnges m = d sin theta/L

theta = 90 deg

m = 2*4.2L/L = 8.4 = 9 nearly

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