Question

1. What is the first law of Photodynamics?

2. Explain the difference between Radiance, Irradiance, Fluence and Joules

3. What is better and why - pulse of continuous current

4. What is a Joule in mW and what does it mean

5. Write out a comparision between Thor and the EDFE

6. What is polychromatic

7. How does light affect Mitochondiria - biochemical pathways

Answer 1

The first law of Photodynamics states, “For performing a photochemical reaction, a molecule must absorb photon for exiting an electron to move its higher energy orbital.”

Radiance is use to measure flux density per unit solid angle. It has unit of [watts/ (meter² steradians)]. Radiance is telling like how much radiance is emerging from a source. Irradiance tells about how much radiance is striking to a surface. It has unit of luminous/m² which also called as lux. Fluence is use to measure radiance from all possible directions; for this an object can also in moving phase. Therefore, fluence can measure radiance from any type of surface even in small volumes. Joule is a unit of measuring energy and account for moving an object 1 meter for applying one Newton force.

Pulse rate measures the battery dying condition. It tells about the maximum limit of charging a battery and over that limit fails the battery. Continuous current is the standard measure to charge the battery under an amp limits.

In one mW or milliWatt there is 0.0010 joules in 1 second or 10^-3 joules in 1 second.