4. light travels fastest when passing through which of these mediums?\na. water\nb. glass\nc. a vacuum…

4. light travels fastest when passing through which of these mediums?\na. water\nb. glass\nc. a vacuum (empty space)\nd. air\n5. when light moves from air into water, it slows down and changes direction. this change in direction is called:\na. reflection\nb. absorption\nc. refraction\n6. which statement about the speed of light is true?\na. light travels fastest through a dense medium like diamond.\nb. light travels at the same speed in all mediums.\nc. light travels slower in materials like glass and water than it does in a vacuum.\nd. light speeds up when moving from water to air.

4. light travels fastest when passing through which of these mediums?\na. water\nb. glass\nc. a vacuum (empty space)\nd. air\n5. when light moves from air into water, it slows down and changes direction. this change in direction is called:\na. reflection\nb. absorption\nc. refraction\n6. which statement about the speed of light is true?\na. light travels fastest through a dense medium like diamond.\nb. light travels at the same speed in all mediums.\nc. light travels slower in materials like glass and water than it does in a vacuum.\nd. light speeds up when moving from water to air.

Answer

Brief Explanations:

  • Question 4: Light travels fastest in a vacuum. In other mediums like water, glass, and air, light interacts with particles, which slows it down.
  • Question 5: When light moves from one medium (air) to another (water) and changes direction due to a change in speed, this is called refraction. Reflection is when light bounces back, and absorption is when light is taken in by a material.
  • Question 6:
    • Option A: Dense mediums (e.g., diamond) slow light down, so this is false.
    • Option B: Light speed varies in different mediums (e.g., slower in water than in air), so this is false.
    • Option C: Glass and water are denser than a vacuum, so light is slower in them, which is true.
    • Option D: While light speeds up when moving from water to air, the statement in option C is a more general and accurate description related to the comparison with a vacuum.

Answer:

  1. C. A vacuum (empty space)
  2. C. Refraction
  3. C. Light travels slower in materials like glass and water than it does in a vacuum.