Physics, 14.04.2020 19:47 mal5546

A ray of light strikes the midpoint of one face of an equiangular (60°–60°–60°) glass prism (n = 1.5) at an angle of incidence of 39.8°. (a) Trace the path of the light ray through the glass, and find the angles of incidence and refraction at each surface.

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Answer from: invocx

The path of light ray through the glass is shown on the first uploaded image

First surface:

Angle of incidence is i_1 = 39.0^o

Angle of refraction is r_1= 25.23^o

Second surface:

Angle of incidence is i_2 = 34.77^o

Angle of refraction is r_2= 58.80^o

Since the angle of incidence is equal to the angle of reflection

Then at the first surface the angle of reflection is R = 39.8^o

And at the first surface the angle of reflection is R_2 = 34.77^o

Explanation:

From the question we are told that

The angle of incidence is i_1 = 39.0^o

The refractive index of the prism is $n_{p} = 1.5$

The angle of the prism is A = 60^o

The path of light ray through the glass is shown on the first uploaded image

For the first surface of the prism

According to Snell's law

$n_{air} sin( i_1) = n_{p} sin( r_1)$

The refractive index of air $n_{air}$ has a constant value of 1

Now making the angle of refraction at the first surface of the prism r_1 the subject

$r_1 = sin^{-1}[\frac{sin (i_1) }{n_{p}} ]$

$= sin^{-1}[\frac{sin(39.8)}{1.5} ]$

r_1= 25.23^o

For the second surface of the prism

looking at the diagram on the first uploaded image the angle of incidence is mathematically evaluated as

i_2 = A - r_1

Substituting values

i_2 = 60 -25.23

=34.77^o

According to Snell's law

$n_{p} sin( i_2) = n_{air} sin( r_2)$

Now making the angle of refraction at the second surface of the prism r_2 the subject

$r_2 = sin^{-1} [\frac{n_p sin(i_2)}{n_air} ]$

Substituting values into the equation

$r_2 = sin^{-1} [\frac{1.5 * sin(34.77)}{1}]$

r_2 =58.8^o

Answer from: Quest

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

Answer from: Quest

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!

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