Athin flashlight beam traveling in air strikes a glass plate at an angle of 52° with the plane of the surface of the plate. if the index of refraction of the glass is 1.4, what angle will the beam make with the normal in the glass?

To solve this problem it is necessary to apply Snell's law and thus be able to calculate the angle of refraction.

From Snell's law we know that

Where,

n_i = Refractive indices of each material

= Angle of incidence

= Refraction angle

Our values are given as,

Replacing

Re-arrange to find

Therefore the  angle will the beam make with the normal in the glass is 26°

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg