(Detailed Explanation) How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy? (1) 4.99×10^23(2) 7.99×10^30(3) 5.67×10^23(4) 1.25×10^31(5) 3.75×10^23 = 4.99e23 Photons Explanation: We know, c = f λ (Equation 1) Here, c = speed of light (m/s) f= frequency (Hz) λ = wavelength (m) E=h f (Equation 2) … Read more

What does IP44 mean? IP44 Rating Explained

The IP44 means the degree of protection against solid objects bigger than 1 mm and splashing water from all directions. Here, ‘IP’ stands for Ingress Protection or International Protection, and digits ’44’ describe the exact degree of protection against contact, and the ingress of foreign bodies as well as water. You may have seen IP … Read more