Two flat glass plates are separated at one end by a wire of diameter 0.20 mm; at the other end they touch. thus, the air gap between the plates has a thickness ranging from 0 to 0.20 mm. the plates are 15.0 cm long and are illuminated from above with light of wavelength 600.0 nm. how many bright fringes are seen in the reflected light?

668 bright fringes

Explanation:

t = Thickness = 0.2 mm

= Wavelength = 600 nm

m = Number of fringes

We have the fringe width relation

So, total number of fringes will be including m = 0 is

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle