Lesson Worksheet: Refraction of Light at a Boundary between Two Media Science

In this worksheet, we will practice describing the deflection of light rays at the boundaries of different media

Q1:

Fill in the blanks: The direction of a light ray can turn through an angle when the light ray passes through of different .

  • Aa medium, boundaries
  • Ba boundary, media
  • Can angle, boundaries

Q2:

Which of the following diagrams correctly shows how a protractor must be placed to measure an angle of incidence of a ray incident on a block of glass?

  • A
  • B
  • C
  • D
  • E

Q3:

The diagram shows how a protractor is used to measure the angles of incidence of two rays that are incident on a glass block. What is the difference between the angles of incidence?

Q4:

Three light rays are incident at the same point on a block of glass. Which of the following is correct?

  • AThe refracted ray for the green incident ray will have an angle of refraction greater than that of the red refracted ray.
  • BThe refracted ray for the green incident ray will have an angle of refraction less than that of the blue refracted ray.

Q5:

Which color arrow correctly shows the direction of a light ray after it passes from air into a block of uniform-density glass?

  • AThe blue arrow
  • BThe purple arrow

Q6:

The direction of a light ray can turn through an angle when it crosses the boundary of different media. What is the term for this?

  • ARefraction
  • BDispersion
  • CReflection

Q7:

What is the angle of refraction of the refracted light ray shown?

Q8:

A block of glass rests on a flat surface that is in an air-filled room. Which of the following is the air–glass boundary?

  • AAll the faces of the glass block except the face resting on the surface
  • BAll the air in the room
  • CThe volume within the glass block
  • DAll the faces of the glass block

Q9:

Fill in the blank: A substance that a light ray travels in is called .

  • Aa medium
  • Ban angle
  • Ca direction

Q10:

Complete the sentence: When a rod rolls from a smooth surface onto a rough surface, the direction of the motion of the rod . When a light ray passes from air into a block of glass, the direction of the light ray .

  • Adoes not change, turns through an angle
  • Bturns through an angle, turns through an angle
  • Cturns through an angle, reverses

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