Question

Spherical node shown in figure-1 is best represented by which point in figure-2. 

• A. A
• B. B
• C. C
• D. D

Hint:

Nodes correspond to the roots (zero crossings) of the radial wave function.

Answer 1

The Correct Option is B

Figure-1 shows an electron probability density distribution (likely 2s orbital) with a white circular region indicating a spherical node (where probability is zero) at a certain radius $r$.
Figure-2 is a plot of the radial wave function $\psi(r)$ versus radius $r$.
A node occurs where the wave function $\psi(r)$ crosses the horizontal axis (i.e., $\psi(r) = 0$).
In Figure-2:
- Point A is a local maximum.
- Point B is where the curve intersects the r-axis ($\psi = 0$).
- Point C is a local minimum.
- Point D is on the tail of the function.
The node corresponds to $\psi = 0$, which is represented by Point B.