User blog:Muhammedmco/To Aru Majutsu no Index - Plasma, Son!

Introduction
Feat in Question.

Calc
Accelerator is 1.68 m.

Since we can't see his full height in the picture when he was creating the plasma ball, i will settle with his head.

Average head to height ratio is 1 / 7.5

Accelerator's head in meters = 0.224 m.

Accelerator's head in pixels = 142 px.

0.224/142 = 0.001577464789 m/px.

Plasma Ball Diameter = 332 px = 0.5237183099 m.

Plasma Ball Radius = 0.2618591549 m.

Surface area = 4*(22/7)*r^2

Plugging it into this calc:

Area = 0.861679 m^2.

To get the energy, we will use Stefan-Boltzmann Law.

Q = sigma x T^4 x area

The highest temperature of plasma can reach up to 5.5 trillion celsius, or 5.5000000003e12 kelvin

Temperature = 5.5000000003e12 kelvin.

Plasma Emissivity in high temperatures is 3.185.

Emissivity = 3.185

Plugging all of this into this calc:

E = 1.4239304015731071e44 Joules = 1.423930402 Foe (Large Star level).

This would scale to Touma's durability, since he took one of those head on without blocking it with Imagine Breaker.

Conclusion
Plasma, Son! = 1.423930402 Foe (Large Star level).