Question

Figure shows a ray of light meeting the glass of the window of a car at an angle of

incidence of 40.

40

(Assuming that, the refractive index of glass is 1.5, find the angle of refraction for this ray in the glass.

Complete the diagram by sketching the path of the ray through the glass and out on the other side. (i) Use the diagram to explain the effect of the glass on what is seen by the driver?​

Answer 1

Answer:

the angle of reflection is 25degree

Explanation:

n=

sin r

sin i

Where,

"n" is the refractive index

"i" is the angle of incidence

"r" is the angle of refraction

From given,

\begin{gathered}i = 40^{\circ}\\\\n = 1.5\\\\r = ?\end{gathered}

i=40

∘

n=1.5

r=?

Substituting the values we get,

\begin{gathered}1.5 = \frac{sin\ 40}{sin\ r}\\\\sin\ r = \frac{sin\ 40}{1.5}\\\\sin\ r = \frac{0.64278}{1.5}\\\\sin\ r = 0.42852\\\\r = sin^{-1} 0.42852\\\\r = 25.3736\\\\ r \approx 25^{\circ}\end{gathered}

1.5=

sin r

sin 40

sin r=

1.5

sin 40

sin r=

1.5

0.64278

sin r=0.42852

r=sin

−1

0.42852

r=25.3736

r≈25

∘

Thus angle of refraction for this ray in the glass is 25 degrees