1. Questions

physics(optics)

The critical angle between an equilateral prism and air is 45 degrees.if the incident ray is perpendicular to the refracting surface,then what happens?

  1. 👍
  2. 👎
  3. 👁
Timothy

  1. nothing.

    1. 👍
    2. 👎
    Steve

  2. It is totally reflected from the second surface and emerges out perpendicularly from third face into air

    1. 👍
    2. 👎
    Anonymous

  4. So,in the question it is given angle od incidence is 90 degree.(perpendicular to refracting surface ).Now since it is an equateral triangle each angle is 60 degree.As the light touches the 2 nd surface we can see a triangle there with angles 60 degree and 90 degree so obviously the other angle is 30 degree.when we draw a normal we can understand that angle of incidence is 60 degree (90-30) .Given critical angle is 45 degree.here angle of incidence is greater than 45 i.e, 60 degree.so this is the condition for TIR.so it will get reflected to the same medium.Again when the light ray reaches the 3 rd side we can again consider a triangle . calculating the angles we will get angle of refraction ad 90 degree. so it will emerge out perpendicular to the 3 rd surface.
    Hope this helps.😊

    1. 👍
    2. 👎
    Aiswarya

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    1. Hannah drew a pattern using only equilateral triangles. Which of the following statements about the angles is an equilateral triangle is true? A. The measurement of each angle is 60 degrees** B. The measurement of each angle is

  2. physics

    Light is incident from air onto a flat transparent slab of material, at an angle of 62.2° with the normal. The reflected ray and the refracted ray are perpendicular to each other. What is the index of refraction of the

  3. physics

    if the angle between the incident ray and reflected ay is 120 degrees, what is the angle of reflectio?

  4. Physics

    A light ray incident upon a mirror makes an angle of 36 with the mirror , what is the angle between incident ray and the reflected ray

  1. math

    Plz explain to me how to do this : The angles of an equilateral triangle are congruent. If x represents the measure of one angle of an equilateral triangle which equation represents the sum of the angle measures of the triangle A.

  2. physics

    A ray of light enters the top of a glass of water at an angle of 36 degrees with the vertical. What is the angle between the refracted ray and vertical? The answer is 26 degrees but I keep getting 22 degrees. I used snell's law:

  3. physics

    The 45-45-90 triangular prism shown in the figure has an index of refraction of 1.44, and is surrounded by air. A ray of light is incident on the left face at an angle of 46.0°. The point of incidence is high enough that the

  4. 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?

  1. Physics

    Light is incident from water onto a flat transparent slab of material, at an angle of 48.8° with the normal. The reflected ray and the refracted ray are perpendicular to each other. What is the index of refraction of the

  2. Physics

    The angle between an incident ray and the mirror is 30 degrees What is the angle of incidence? What is the angle of reflection? What is the total angle turned by the ray?

  3. Physics

    (c22p46) A light ray of wavelength 589 nm is incident at an angle θ on the top surface of a block of polystyrene surrounded by air. PART 3: Find the maximum value of θ for which the refracted ray will undergo total internal

  4. physics

    A jewel thief decides to hide a stolen diamond by placing it at the bottom of a crystal-clear fountain. He places a circular piece of wood on the surface of the water and anchors it directly above the diamond at the bottom of the

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