Based on the information in the graph, the atom which is listed below is the most stable would be A. Oxygen-16 (O-16).
Answer:

Explanation:
= Actual wavelength = 
= Relative permittivity = 1.44
The observed wavelength in the glass is given by

The wavelength lies in the range of green light.
Hence, the observed color of light is 
B, heat, is the correct answer. Heat is represented by a capital q in thermodynamic equations.