Either as:
A particle, the photon,
A packet of energy, the quantum of electromagnetism(still known as the photon), and
A wave of a specific frequency, a wave of radiation that has a certain energy
define light and vision in relation to natural light and artificial light.
Define "light bulb"
Yes, light is a wave. It exhibits properties such as interference, diffraction, and polarization, which are characteristics of wave behavior. These properties help define light as a wave phenomenon.
Faster then speed of light.
The distance light will travel, in a vacuum, in one minute.
The Ray model is light is an object that measures llamas back feet
Nationalism in the light of Islam would mean what school of religious thought you subscribe to,
It depends on how you define shadow. If you define shadow as an area of lessened light caused by objects in the light path, then yes water can and does cast shadows, esp. waves, ripples, etc.
heat currents speed light
It is the ability of a lens to converge or diverge a ray of light.
Allows you to gather more light from a distant object.
hot bulb and batter