physics

light travels from ethanol intro crown glass. what's the brewster angle in this situation? illustrate your answer with a light ray diagram. what's the signifcance of this angle of incidence?

n1=1.36for ethanol
nR=1.52 for crown glass

tanangleB=nR/ni
=1.52/1.36
=1.12 (48.2 degrees)

the only thing that I have in the diagram is the face that both the incident and reflected rays are 48.2 degrees in the ethanol..not even sure if that is right.

not sure how to draw it or what the signicance is....please explain.

physics - bobpursley, Saturday, January 16, 2010 at 3:44pm

Bob - I looked at the website you gave me. In order to draw it, do I need to also figure out the angle of incidence and reflection? If so, how do i do that...thanks

physics - bobpursley, Saturday, January 16, 2010 at 5:25pm
WEll, you have the angles of incidence of 48.2, so use snell's law to get the angle of refracation.

okay so I did that, and have my diagram drawn now, but what is the significance? I know that the angle of incicdence, from Brewster'slaw, is 48.2 degrees, and the angle of refraction, from Snell' Law, is 41.84. However this wouldn't be total internal reflection, since its going from ethanol -->crown glass, which is lower index of refraction to higher and total internal reflection requires from higher to lower. So why is significant about this then?

  1. 👍
  2. 👎
  3. 👁
  1. The Brewster angle and the Total Internal Reflection angles are different. When light is incident at the Brewster angle, the refracted wave and reflected waves are perpendicular.

    http://en.wikipedia.org/wiki/Brewster's_angle

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. science-physics

    a ray of light traveling from the air into crown glass strikes the surface at an angle of 30 degrees. what will the angle of refraction be? please help me!! don't ignore this !

  2. Physics

    A ray of light enters a glass block from air at an angle of incidence of 50 degrees. The angle of refraction is 30 degrees. What is the refractive index of the glass? What is the value of critical angle for this glass? Thank you

  3. Physics

    3. Yellow light travels through a glass block at a speed of 1.97x108 m/s. The wavelength of the light in this type of glass is 3.81x10-7 m. What is the frequency of yellow light?

  4. physics

    Red light with a wavelength of 7.0x10^-7 m travels at a speed of c. When it enters glass it's speed is reduced to 2.0x10^8 m/s. Calculate the wavelength of this redlight in glass. Assume that the frequency does not change. I'm

  1. Physics

    Light in air is incident upon a piece of crown glass at an angle of 45.0 degrees. What is the angle of refraction?

  2. physic

    the light from a helium neon laser has a wavelength of 632 nanometers in air. the same light has a wavelength of 479.2 in glass. the frequency of the light is the same in air and glass. find the speed of the laser light in glass.

  3. Physics

    A ray of light travelling from glass to air is incident at 50 degree from the glass air boundary. What is angle of deviation if the critical angle is 42 degree

  4. science

    Which of the following choices correctly explains why light separates into colors when moving through a prism? a)The different colors of light travel at different speeds through glass so they refract at different angles. b)The

  1. Physics

    Light of wavelength 550 nm in vacuum passes through a piece of crown glass of refractive index of 1.52. Find the velocity and frequency of light in crown glass.

  2. Math - Logorithms

    The intensity, I, of light, in lumens, passing through the glass of a pair of sunglasses if given by the equation I(x) = I^o(0.8)^x, where x is the thickness of the glass, in millimeters, and I^o is the intensity of light entering

  3. grade 11 physics

    Consider the optical interface between crown glass and ethanol. Under what conditions would total internal relfection be possible at this interface? ilustrate your answer with a light ray diagram. Okay so you need the angle of

  4. physics

    he index of refraction of crown glass is 1.53 for violet light, and it is 1.51 for red light. (a) What is the speed of violet light in crown glass? (b) What is the speed of red light in crown glass?

You can view more similar questions or ask a new question.