Physics: Refraction and Wave Behavior
8 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What happens to light when it travels from air to water?

  • It slows down and bends away from the normal.
  • It stays the same speed and direction.
  • It slows down and bends towards the normal. (correct)
  • It speeds up and bends towards the normal.

    • Which medium is considered rarer compared to water and glass?

  • Plastic
  • Air (correct)
  • Oil
  • Wood

    • Why do stars appear to twinkle?

  • Stars emit light in varying intensities.
  • The density of the atmosphere changes continuously. (correct)
  • The atmosphere's density is constant.
  • They are moving further away from Earth.

    • What optical illusion occurs when viewing a pencil submerged in water?

    <p>It appears bent or raised at the water's surface.</p> Signup and view all the answers

    How does atmospheric refraction affect the appearance of the sun during sunrise and sunset?

    <p>It allows the sun to appear slightly earlier in the morning and later in the evening.</p> Signup and view all the answers

    In which scenario does refraction make it difficult for fishermen to see fish accurately?

    <p>When viewing fish in clear water from above.</p> Signup and view all the answers

    What effect does wearing sunglasses without UV filters have on the eyes?

    <p>It causes pupil dilation and more UV light absorption.</p> Signup and view all the answers

    Which of the following is NOT an example of refraction in daily life?

    <p>The color of the sky during the daytime.</p> Signup and view all the answers

    Study Notes

    Rarer and Denser Mediums

    • A medium where wave speed is higher is called a rarer medium
    • A medium where wave speed is lower is called a denser medium
    • Air is a rarer medium compared to water
    • Water is a denser medium compared to air
    • Glass is a denser medium compared to air
    • Water is a rarer medium compared to glass

    Cause of Refraction

    • Wave speed changes in different mediums
    • When a wave moves from one medium to another, the speed changes
    • This speed change causes refraction
    • Light bends toward the normal when it moves from a rarer to a denser medium
    • Light bends away from the normal when it moves from a denser to a rarer medium

    Twinkling of Stars

    • Light from stars passes through the atmosphere
    • Atmosphere has hot and cold air layers with different densities
    • Air currents change densities continuously
    • Density changes cause the image of the star to move, resulting in the twinkling effect

    Apparent Bending of a Pencil

    • A pencil partially submerged in water appears bent
    • Light bends when passing between air and water
    • This bending is due to a change in speed as light moves between mediums

    Other Examples of Refraction

    • Objects appear farther away than they actually are when observed underwater (swimming pool)
    • Sun appears a few minutes before and after sunrise/sunset
    • Fish appear in a different location than they actually are (fishing)
    • Height of people appears less when observed from across a pool or lake
    • Birds dive straight to catch fish
    • Printed words on paper appear elevated when a glass sheet is placed over them

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Explore the concepts of refraction and the behavior of waves across different mediums in this quiz. Learn how wave speed variations affect light bending and the fascinating phenomenon of twinkling stars. Test your understanding of rarer versus denser mediums and their effects.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser