Athin glass rod is submerged in ethanol. what is the critical angle for light traveling inside the rod? express your answer with the appropriate units.

65.14°

Explanation:

The formula for the calculation of critical angle is:

Where,  

is the critical angle

is the refractive index of the refractive medium.

is the refractive index of the incident medium.

The light ray is travelling from glass to ethanol

Refractive medium is ethanol with refractive index = 1.361

Incident medium is glass with refractive index = 1.500

So,  

Applying in the formula as:

The critical angle is = sin⁻¹ 0.9073 = 65.14°

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

c. 7/3

step-by-step explanation:

a rational number is like pi- it is a repeating decimal.

a. is -1.8

b. 2.236068

c. 2.3333333333333333333

d.   is 3

i hope that ! =)