The concept behind this theory is that of Matter Waves. Here the wave-particle duality is represented. According to the French scientist De Broglie, the wavelength associated with a massive particle is related to its momentum, p, through the Planck constant, h. Mathematically it can be described as,
[tex]\lambda = \frac{h}{p}[/tex]
Here we can deduce that the momentum is inversely proportional to the wavelength,
[tex]\lambda \propto \frac{1}{p}[/tex]
Therefore if P increases the wavelength decrease.
The correct answer is B.
