Concave Mirrors and Light Quiz
45 Questions
0 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 when sunlight is converged by a concave mirror onto a paper sheet?

  • The paper begins to burn (correct)
  • The paper reflects the sunlight
  • The paper becomes wet
  • Nothing happens

    • The principal axis of a mirror is not normal to the mirror at its pole.

    False

    What is the term used to describe the point where light rays converge after reflecting from a concave mirror?

    principal focus

    The distance of the image from the position of the mirror gives the approximate value of the __________ of the mirror.

    <p>focal length</p> Signup and view all the answers

    Match the following terms related to mirrors with their definitions:

    <p>Principal Axis = Normal to the mirror at its pole Focal Length = Distance from the mirror to the focus Concave Mirror = Mirror that converges light rays Convex Mirror = Mirror that diverges light rays</p> Signup and view all the answers

    What is the primary observation made when the paper is held close to a concave mirror directed towards the Sun?

    <p>A sharp, bright spot of light appears</p> Signup and view all the answers

    Looking directly at the Sun is safe when using a concave mirror.

    <p>False</p> Signup and view all the answers

    What occurs if the mirror and paper are held in position for several minutes during the activity described?

    <p>The paper may catch fire.</p> Signup and view all the answers

    What happens to the image formed by a concave mirror when the object is placed between the focus and the pole?

    <p>The image is virtual and upright</p> Signup and view all the answers

    The principal focus of a concave mirror is located halfway between the pole and the center of curvature.

    <p>True</p> Signup and view all the answers

    What is the nature of the image when the object is placed far beyond the center of curvature?

    <p>The image is real, inverted, and reduced in size.</p> Signup and view all the answers

    A concave mirror can form a ______ image depending on the position of the object.

    <p>virtual</p> Signup and view all the answers

    Match the positions of the object with the nature of the image formed:

    <p>Between P and F = Virtual Image At C = Real Inverted Image Beyond C = Real Reduced Image At F = No Image Formed</p> Signup and view all the answers

    What is required to observe the image clearly when using a concave mirror?

    <p>A bright object</p> Signup and view all the answers

    The distance between any two successive lines drawn on the table should equal the ______ of the mirror.

    <p>focal length</p> Signup and view all the answers

    An image formed by a concave mirror can never be magnified.

    <p>False</p> Signup and view all the answers

    What principle governs the behavior of incident and reflected rays at a mirror's surface?

    <p>Laws of reflection</p> Signup and view all the answers

    The angle of reflection is equal to the angle of refraction at a mirror's surface.

    <p>False</p> Signup and view all the answers

    Name one common use of a concave mirror.

    <p>Shaving mirrors or vehicle headlights.</p> Signup and view all the answers

    Concave mirrors are used to __________ sunlight to produce heat in solar furnaces.

    <p>concentrate</p> Signup and view all the answers

    When an object is placed in front of a convex mirror, the image formed is typically:

    <p>Erect and diminished</p> Signup and view all the answers

    Match the following mirror types with their common uses:

    <p>Concave mirror = Solar furnace Convex mirror = Traffic monitoring</p> Signup and view all the answers

    What happens to the size of the image when the object is moved away from a convex mirror?

    <p>The size of the image remains diminished.</p> Signup and view all the answers

    A convex mirror always produces an inverted image.

    <p>False</p> Signup and view all the answers

    What does the refractive index of a medium represent?

    <p>The ratio of the speed of light in two media</p> Signup and view all the answers

    The absolute refractive index of a medium is defined with respect to another medium.

    <p>False</p> Signup and view all the answers

    What is the refractive index of water?

    <p>1.33</p> Signup and view all the answers

    The absolute refractive index of a medium is simply called its __________.

    <p>refractive index</p> Signup and view all the answers

    Match the following media with their refractive indices:

    <p>Water = 1.33 Crown Glass = 1.52 Air = 1.00 Diamond = 2.42</p> Signup and view all the answers

    What is the main phenomenon that occurs when light travels from one medium to another at an angle?

    <p>Refraction</p> Signup and view all the answers

    A person can easily pick up a coin placed at the bottom of a bucket filled with water from the side without any difficulties.

    <p>False</p> Signup and view all the answers

    Why does the coin become visible again when water is poured into the bowl?

    <p>The refraction of light in water raises the apparent position of the coin, making it visible.</p> Signup and view all the answers

    The bending of light when it passes through a glass slab is known as __________.

    <p>refraction</p> Signup and view all the answers

    Match the following activities with their results:

    <p>Activity 10.7 = Difficulty in picking up the coin Activity 10.8 = Coin becomes visible again Activity 10.9 = Line appears bent under the slab Activity 10.10 = Outline of the glass slab is drawn</p> Signup and view all the answers

    In Activity 10.9, what did the observer notice when looking at the line under the glass slab at an angle?

    <p>The line appears bent</p> Signup and view all the answers

    A glass slab placed normal to a line does not change the appearance of the line.

    <p>True</p> Signup and view all the answers

    What is the purpose of drawing the outline of the glass slab in Activity 10.10?

    <p>To observe the effect of refraction and identify the position of the slab.</p> Signup and view all the answers

    What is the unit of power of a lens?

    <p>Dioptre</p> Signup and view all the answers

    Mirrors and lenses can form virtual images only.

    <p>False</p> Signup and view all the answers

    What is the formula used to relate object-distance (u), image-distance (v), and focal length (f) of a spherical mirror?

    <p>1/f = 1/v + 1/u</p> Signup and view all the answers

    The speed of light in vacuum is approximately ______ m s^-1.

    <p>3×10^8</p> Signup and view all the answers

    Where is the needle placed if a convex lens forms a real and inverted image equal to the size of the object at 50 cm?

    <p>50 cm from the lens</p> Signup and view all the answers

    What is the power of a concave lens with a focal length of 2 m?

    <p>-0.5 D</p> Signup and view all the answers

    When a light ray travels from a denser medium to a rarer medium, it bends ______ from the normal.

    <p>away</p> Signup and view all the answers

    Match the following concepts with their descriptions:

    <p>Real Image = Inverted and formed on the opposite side of the lens Virtual Image = Upright and formed on the same side as the object Magnification = Ratio of height of image to height of object Focal Length = Half of the radius of curvature for mirrors</p> Signup and view all the answers

    Study Notes

    Light - Reflection and Refraction

    • Light travels in straight lines in a uniform medium.

    • Reflection is the bouncing of light off a surface. The angle of incidence equals the angle of reflection.

    • Refraction is the bending of light as it passes from one medium to another. The amount of bending depends on the refractive indices of the media and the angle of incidence.

    • Spherical mirrors:

      • Concave mirrors converge light rays.
      • Convex mirrors diverge light rays.

    • Spherical lenses:

      • Convex lenses converge light rays.
      • Concave lenses diverge light rays.

    • Laws of reflection:

      • The angle of incidence equals the angle of reflection.
      • The incident ray, the reflected ray, and the normal to the surface at the point of incidence lie in the same plane.

    • Laws of refraction:

      • The incident ray, the refracted ray, and the normal to the surface at the point of incidence lie in the same plane.
      • The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant for light of a given colour and for a given pair of media. This is known as Snell's Law.

    • Refractive index: The refractive index of a medium is the ratio of the speed of light in vacuum to the speed of light in the medium. A higher refractive index means light travels slower in that medium.

    • Sign conventions:

      • Positive values are assigned to distances measured to the right of the origin
      • Negative values are assigned to distances measured to the left of the origin

    • Mirror formula: 1/v + 1/u = 1/f

    • Lens formula: 1/v + 1/u = 1/f

    • Magnification: m = h'/h = v/u

    • Concave mirror:

      • Can produce both real and virtual images.
      • Real images are inverted.
      • Virtual images are upright.

    • Convex mirror:

      • Always produces virtual, diminished images.

    • Convex lens:

      • Can produce both real and virtual images.
      • Real images are inverted.
      • Virtual images are upright.

    • Concave lens:

      • Always produces virtual, diminished images.

    • Power of a lens:

      • Power is the reciprocal of the focal length.
      • Unit of power is the dioptre (1 dioptre = 1 m-1).

    • Images are determined using ray diagrams.

      • Ray diagrams use three main special rays.

    Studying That Suits You

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

    Quiz Team

    Related Documents

    Physics Chapter 10: Light - Reflection and Refraction PDF

    Description

    Test your understanding of concave mirrors and their effects on light. This quiz will explore concepts such as light convergence, principal focus, and image formation when using mirrors. Ideal for students studying optics in physics.

    More Like This

    Class 10 Light Lesson Review
    3 questions

    Class 10 Light Lesson Review

    AwesomeDoppelganger avatar
    AwesomeDoppelganger
    Understanding Convex and Concave Mirrors
    5 questions

    Understanding Convex and Concave Mirrors

    AvailableMeter avatar
    AvailableMeter
    Physics Chapter 28 and 33 Quiz
    103 questions

    Physics Chapter 28 and 33 Quiz

    ManeuverableForgetMeNot2590 avatar
    ManeuverableForgetMeNot2590
    خصائص المرايا المقعرة
    9 questions

    خصائص المرايا المقعرة

    PoisedSnowflakeObsidian avatar
    PoisedSnowflakeObsidian
    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser