a. Consider an e lactron m ov ing in a circular orbi of rad ius ras show n in Figure 1. From he po intofv iew of the electron, the nuckeus orbits around the e'ectron as can be seen in Figure 2. +Ze Figure 1 Figure 2 From the given infom ation, show that he spin- orbit interaction energy is a function of S-L, w here S and L are respectively spin and orb ital angu lar m om enta 11 b. Cakubte the possible va lues of the quantum num bers j and m , for states in w hich 1 = 2 and s= 12. a. Two identical particles m ove independently in a one-dim ensional box of bng th a, one being in he ground state of he infhie square w ell and he other being in the first excited state of that po tential. A ssum e zero spin so that the eigenfunctions for he systm are just the spatialeigentunctions Evaluate he sym m etric and antisym m etric btal eigenfunctions
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
![a Consideran e lecton m ov ing in a circular orbi of rad ius ras show n inFigure 1. From the pointofv iew
of the electron, the nuckus orb its around he e'ectron as can be seen in Figure 2.
+Zes
Figure 1
Figure 2
From the given infom ation, show that he spin- orbit interaction energy is a function of S-L, w here
S and L are respectively spin and orb ital angu lar m om enta
11
b. Cakube the possible va lues of he quantum num bersj and m . for states in w hich 1= 2 and s= 1/2.
C. Two identical particles m ove independently in a one-dim ensibnal box of ength a, one being in he
ground state of he infnit square w ell and he other being in the firstexcited state of that po tential.
A sum e zero spin so that the eigenfunctions for the systm are just the spatialeigenfunctions
Evaluate he sym m etric and antisym m etric btal eigenfunctions
V erify that in these eigenfunctions does nom alize them properly.
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