40V because it will provide the same amount of power.
Answer:

Explanation:
Given that,
Wavelength, 
We need to find the frequency of the violet light.
We know that the relation between frequency and wavelength is given by :

So, the frequency of violet light is
.
The potential energy of an object is defined by the equation: PE = mgh, where m = the mass of the object, g = the gravitational acceleration and h = the object's height above the ground.
I think its A let me know its wrong or not