Physics Chapter: Light and Lenses
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Questions and Answers

What type of light production occurs when an electric current passes through a gas?

  • Electric Discharge (correct)
  • Light Emitting Diode
  • Incandescence
  • Phosphorescence
  • Which of the following objects is non-luminous?

  • A match
  • A flashlight
  • A book (correct)
  • The Sun
  • What is the sequence of colors that visible light can be broken down into called?

  • Light Frequency
  • Visible Spectrum (correct)
  • Radiant Energy
  • Chromatic Scale
  • What is the primary characteristic of electromagnetic waves compared to radio waves?

    <p>Electromagnetic waves can travel at the speed of light without a medium (B)</p> Signup and view all the answers

    What data describes the production of light from high temperatures?

    <p>Incandescence (B)</p> Signup and view all the answers

    What is the size of the image produced by a diverging lens compared to the object?

    <p>The image is smaller than the object. (C)</p> Signup and view all the answers

    What orientation does the image take when produced by a diverging lens?

    <p>Upright (A)</p> Signup and view all the answers

    Which statement best describes the nature of the image produced by a diverging lens?

    <p>The image is virtual and cannot be projected on a screen. (B)</p> Signup and view all the answers

    Where is the image produced by a diverging lens located in relation to the lens?

    <p>On the same side of the lens as the object. (A)</p> Signup and view all the answers

    Which characteristic of the image produced by a diverging lens is incorrect?

    <p>The image can be projected onto a screen. (A)</p> Signup and view all the answers

    What happens to light rays that are parallel to the principal axis when passing through a diverging lens?

    <p>They are directed away from the secondary principal focus. (B)</p> Signup and view all the answers

    If an object is placed at a distance greater than 2$F$ from a converging lens, what will be the characteristics of the image formed?

    <p>Smaller and inverted (C)</p> Signup and view all the answers

    What location of the object results in a virtual image being formed by a converging lens?

    <p>Inside $F$ (B)</p> Signup and view all the answers

    Where is the principal focus located in relation to a converging lens?

    <p>On the opposite side of the lens from the incident rays (D)</p> Signup and view all the answers

    What is the attitude of an image formed at a distance between $F$ and 2$F$ using a converging lens?

    <p>Inverted (C)</p> Signup and view all the answers

    What happens to light when it passes from a medium with a higher speed to one with a lower speed?

    <p>Light bends towards the normal (B)</p> Signup and view all the answers

    Which of the following describes a characteristic of a converging lens?

    <p>It focuses parallel light rays to a single point (C)</p> Signup and view all the answers

    What defines the critical angle in the context of total internal reflection?

    <p>The angle of incidence that results in an angle of refraction of 90 degrees (A)</p> Signup and view all the answers

    In the context of curved mirrors, which statement accurately describes a diverging mirror?

    <p>It reflects light rays outward (A)</p> Signup and view all the answers

    Which of the following statements is true regarding the behavior of light during refraction?

    <p>The bending of light depends on the speed of light in the different media (C)</p> Signup and view all the answers

    What term describes the immediate emission of visible light due to the absorption of ultraviolet light?

    <p>Fluorescence (B)</p> Signup and view all the answers

    Which of the following describes a material that does not transmit any light?

    <p>Opaque (A)</p> Signup and view all the answers

    According to the law of reflection, what is true about the angle of incidence and the angle of reflection?

    <p>They are always equal. (A)</p> Signup and view all the answers

    What kind of reflection occurs on a smooth surface like still water?

    <p>Specular reflection (C)</p> Signup and view all the answers

    Which phenomenon is characterized by a chemical reaction producing light with little or no heat?

    <p>Bioluminescence (C)</p> Signup and view all the answers

    What is the effect of triboluminescence?

    <p>Light emitted due to friction from certain crystals (D)</p> Signup and view all the answers

    Which option best describes a virtual image?

    <p>An image that appears to come from a location different from the light source (A)</p> Signup and view all the answers

    Which term refers to a material that transmits some light but not all?

    <p>Translucent (A)</p> Signup and view all the answers

    Flashcards

    Converging mirror

    A curved mirror where the reflection is inwards, also called concave.

    Refraction

    Occurs when light passes from one medium to another, causing it to bend and change direction.

    Diverging mirror

    A curved mirror where the reflection is outwards, also called convex.

    Critical angle

    The angle at which light must hit a boundary between two mediums to achieve total internal reflection.

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    Converging lens

    A lens that is thickest in the middle and causes parallel light rays to converge to a point.

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    Principal Axis

    The line passing through the center of a lens, where light rays travel parallel to it and converge at a single point.

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    What is light?

    The fastest thing in the universe. It travels in straight lines and does not require a medium to travel.

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    Principal Focus (F)

    A point on the principal axis of a converging lens where parallel rays converge.

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    What is the Sun?

    The sun is a huge ball of burning gas that releases massive amounts of energy in the form of light and heat.

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    What is the visible spectrum?

    A continuous sequence of colors that make up visible light, often remembered with the acronym ROYGBIV.

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    Secondary Principal Focus (F)

    A point on the principal axis of a diverging lens where parallel rays appear to diverge from.

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    Real Image

    An image formed by a lens that can be projected onto a screen.

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    What is Incandescence?

    The production of light due to high temperatures, such as in a light bulb or a campfire.

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    What is Phosphorescence?

    The emission of light by the absorption of ultraviolet light, resulting in the glow for a longer period of time, such as glow-in-the-dark toys.

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    Virtual Image

    An image formed by a lens that cannot be projected onto a screen.

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    Transparent

    A material that transmits all or almost all incident light, but absorbs or reflects the rest.

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    Translucent

    A material that transmits some incident light, but absorbs or reflects the rest.

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    Opaque

    A material that does not transmit any incident light; it is either reflected or absorbed.

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    Fluorescence

    The immediate emission of visible light as a result of the absorption of ultraviolet light.

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    Chemiluminescence

    The direct production of light as a result of a chemical reaction, with little or no heat produced.

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    Bioluminescence

    The production of light in living organisms due to a chemical reaction, with little or no heat produced.

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    Triboluminescence

    The production of light from friction as a result of scratching, crushing, or rubbing certain crystals.

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    Light ray

    A line on a diagram representing the direction of light travel.

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    Image Size in Diverging Lens

    The image formed by a diverging lens is always smaller than the object.

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    Image Orientation in Diverging Lens

    The image formed by a diverging lens is always upright, meaning it doesn't appear upside down.

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    Image Type in Diverging Lens

    The image formed by a diverging lens is a virtual image, meaning it cannot be projected onto a screen.

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    Image Location in Diverging Lens

    The image formed by a diverging lens always appears on the same side of the lens as the object.

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    Diverging Lens

    Diverging lenses, also called concave lenses, cause light rays to spread out.

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