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Light Test - 1

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Weekly Quiz Competition
  • Question 1
    1 / -0

    Rainbow is a

    Solution

    Explanation:

    Rainbow is a natural spectrum that is caused by reflection,refraction and dispersion of light in water droplets suspended in air to form spectrum of light appearing in the sky.It always appear in the sky directly opposite to the sun.

     

     

  • Question 2
    1 / -0

    What is the name of object through which light can pass?

    Solution

    Explanation:

    The object through which light can pass easily is called transparent object. Glass, water and thin plastic sheets are transparent object. When light encounters transparent material almost all of it passes directly through them.

     

     

  • Question 3
    1 / -0

    Band of seven colours obtained on screen after dispersion is called

    Solution

    Explanation:

    The band of seven colours obtained on screen when white  light passes through a prism  after dispersion is called spectrum of white light. These colours are arranged as Violet, Indigo, Blue, Green, Yellow, Orange and Red

     

     

  • Question 4
    1 / -0

    Speed of light is fastest in

    Solution

    Explanation:

    Speed of light is fastest in air and vacuum. Speed of light is almost 3x 108m/s in vacuum /air.Speed of light decreases with increase in density of the medium. Light travels slowest in diamond.

     

     

  • Question 5
    1 / -0

    Which type of lens is present in our eyes?

    Solution

    Explanation:

    Human eye contains transparent biconvex lens made up of crystalline protein which is elastic and flexible through which ray of light enters and focussed on the retina to form real image

     

     

  • Question 6
    1 / -0

    Object that emit light is called

    Solution

    Explanation:

    The objects that emit light of their own are called luminous object. A luminous object is one that givess off light or that glows of its own. Sun, stars, bulb, tube etc are example of luminous object.

     

     

  • Question 7
    1 / -0

    In human eyes, image is formed on

    Solution

    Explanation:

    In human eyes, image is formed on retina. Retina acts as a screen in human eye on which inverted  image is formed which is passed to brain through optical nerve and it interprets the image.

     

     

  • Question 8
    1 / -0

    ___________ help us to see the objects.

    Solution

    Explanation:

    Light enable us to see the objects around us. During day sun generates sufficient amount of light to illuminate the objects. Reflected light after incidenting on the surface enters the eye to form image on retina which helps to see the objects.

     

     

  • Question 9
    1 / -0

    Splitting of white rays of light into seven colours is called

    Solution

    Explanation:

    Splitting of white ray of light into seven colours when passes through a prism is called dispersion of light. Different colours of light bend through different angles with respect to the incident ray as they pass through the prism, thus emerge along different paths and seen as dispersed

     

     

  • Question 10
    1 / -0

    Light is a form of

    Solution

    Explanation:

    Light is a form of energy that enable us to see the different things present around us. When it strikes the earth's surface it converts to heat which is in the form of photons. These helps in transforming to electromagnetic energy

     

     

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