Pz

which scientist proved experimentally that a shadow of the circular object illuminated with coherent light would have a central bright spot?

which scientist proposed a mathematical solution for the wave nature of light?

young

fresnel

poisson

arago

young

fresnel

poisson

arago

Arago experimentally proved bright spot.

Fresnel is credited for the solution of wave nature of light.

Explanation:

It was Poisson who showed that Fresnel's wave model of light and predicted a bright spot in the very center of a circular shadow, which he interpreted as an absurd result. But the credit to prove it experimentally goes to Arago he also gives strong evidence towards the wave theory of light,which are coherent and have a central bright spot.

Later in his honor that spot is also called Arago bright spot.

And the mathematical solution for the wave nature of light is explained by Fresnel and Huygen combined called Huygens-Fresnel principle.

So from the option we will go with Fresnel.

It was Arago who experimentally prove dthe central bright spot.

And Fresnel gives the mathematical solution of wave nature of light.

answer: good job it's all correct !

explanation:

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000