Fiber optics are an important part of our modern internet. In these fibers, two different glasses are used to confine the light by total internal reflection at the critical angle for the interface between the core (n_core = 1.514 ) and the cladding (n_cladding = 1.43). Required:
a. Numerically, what is the largest angle (in degrees) a ray will make with respect to the interface of the fiber θ_max, and still experience total internal reflection?
b. Suppose you wanted the largest angle at which total internal reflection occurred to be θ_max = 5 degrees. What index of refraction does the cladding need if the core is unchanged?

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by