1. A device that is used to break an electric circuit is called switch. https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-12/

    A device that is used to break an electric circuit is called switch.

    https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-12/

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  2. No, to see the reflection, source of light is required. We can see only in the presence of light. https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-11/

    No, to see the reflection, source of light is required. We can see only in the presence of light.

    https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-11/

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  3. A cylinder object can cast shadows in two ways. When the top circular view faces the shining object, a circular shape shadow is formed. When its curved side faces the shining object, it casts a rectangular shadow. https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-11/

    A cylinder object can cast shadows in two ways. When the top circular view faces the shining object, a circular shape shadow is formed. When its curved side faces the shining object, it casts a rectangular shadow.

    https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-11/

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  4. Opaque : A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon. Transparent : Air,Read more

    Opaque : A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon.
    Transparent : Air, water.
    Translucent : A sheet of polythene, smoke, a sheet of plane glass, fog, a sheet of cellophane, a wire mesh.
    Luminous : A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly.
    Non – luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon.

    https://www.tiwariacademy.com/ncert-solutions/class-6/science/chapter-11/

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