(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Quantum effects are negligible in "macroscopic" world.

Show than on example.

A tennis ball with speed 0.5 m/s is thrown thru a window.

Dimensions of a window are 1*1.5 m.

Calculate vertical and horizontal diffraction angles.

2. Relevant equations

[tex]\lambda[/tex]=h/p

dSin[tex]\alpha[/tex]=n[tex]\lambda[/tex]

3. The attempt at a solution

For horizontal diffraction angle.

[tex]\lambda[/tex]=h/mv=h/m*0.5

I assumed that n=1.

so

dSin[tex]\alpha[/tex]=n[tex]\lambda[/tex]=h/m*0.5

[tex]\alpha[/tex]=ArcSin(h/m*0.5*d)=ArcSin(h/m*0.5*1)

from this I would conclude thath, alpha is negligible small, that is

quantum effect are negligible.

I would do the same thing for vertical angle.

I' not shure if I'm right ?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Tennis ball diffraction angles

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**