Answer:
fill the flask with water. apply heat, when you see the vapor you will know is heat
Answer: The Answer is A.
Explanation:
The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy. Equivalently, the longer the photon's wavelength, the lower its energy.
Hope this Helps!
Explanation:
The energy of electromagnetic radiation is given by :

Where, h is the Planck's constant
(a) A gamma ray, 
Energy,

(b) A microwave, 
Energy,

(c) A AM radio wave, 
Energy,

Therefore, this is the required solution.