Answer:C . The wave nature of light.
Explanation: The wave nature of light has been described in the refraction and diffraction of light when it comes in contact with a prism.
Wave nature of light has been described through this equation C= velocity( measured in meters per second square), Wavelength (lambda) which is the distance between successive antinodes or nodes,it is measured in meters. and Frequency is the number of times light waves pass through a point in one second, usually measured in Hertz(Hz)
Below is a
Thin-lens equation (also works for mirrors)
1/f=1/u+1/v
Where f is the focal length, u is distance of object,v is the distance between the optical centre and the image of the object.