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 Light 40 Flashcards |
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What type of object emits its own light? |
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Luminous object |
Card: 2 / 40 |
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Which of the following is a natural source of light? A) Bulb B) Candle C) Sun D) Torch |
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C) Sun |
Card: 4 / 40 |
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Riddle: I shine at night, but I do not have my own light. What am I? |
Card: 5 / 40 |
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The Moon |
Card: 6 / 40 |
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True or False: Non-luminous objects can be seen in complete darkness. |
Card: 7 / 40 |
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False. Non-luminous objects cannot be seen in darkness; they require light to be visible. |
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The process by which light is spread in various directions after striking a medium is called ______. |
Card: 9 / 40 |
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Scattering of light |
Card: 10 / 40 |
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What is the speed of light in meters per second? |
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3 x 10⁸ m/s |
Card: 12 / 40 |
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Which materials allow all light to pass through them? |
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Transparent materials |
Card: 14 / 40 |
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Which type of eclipse occurs when the Earth comes between the Sun and the Moon? |
Card: 15 / 40 |
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Lunar eclipse |
Card: 16 / 40 |
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Fill in the blank: An object that blocks all light is called ______. |
Card: 17 / 40 |
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Opaque object |
Card: 18 / 40 |
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True or False: A pinhole camera requires a lens to focus light. |
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False. A pinhole camera does not need a lens; it uses a tiny hole to form images. |
Card: 20 / 40 |
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What happens during a total solar eclipse? |
Card: 21 / 40 |
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The moon completely covers the sun, blocking all sunlight from reaching parts of Earth. |
Card: 22 / 40 |
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Which of the following materials is an example of a translucent material? A) Glass B) Wax paper C) Wood D) Metal |
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B) Wax paper |
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Riddle: I am a shadow's dark part where no light reaches. What am I? |
Card: 25 / 40 |
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Umbra |
Card: 26 / 40 |
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Fill in the blank: The property of light to travel in a straight line is known as ______. |
Card: 27 / 40 |
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Rectilinear propagation of light |
Card: 28 / 40 |
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True or False: The brightness of a shadow depends on the color of the object casting it. |
Card: 29 / 40 |
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False. A shadow is always dark regardless of the color of the object. |
Card: 30 / 40 |
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What is the effect of light scattering in the atmosphere? |
Card: 31 / 40 |
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It helps us see objects that are not in the direct path of sunlight. |
Card: 32 / 40 |
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Which type of light beam is formed when rays of light come together at one point? |
Card: 33 / 40 |
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Convergent beam |
Card: 34 / 40 |
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Fill in the blank: The lighter part of a shadow where some light reaches is called ______. |
Card: 35 / 40 |
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Penumbra |
Card: 36 / 40 |
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What is an example of an artificial source of light? |
Card: 37 / 40 |
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Bulb |
Card: 38 / 40 |
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Riddle: I am formed when an opaque object blocks light. What am I? |
Card: 39 / 40 |
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Shadow |
Card: 40 / 40 |
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Completed! Keep practicing to master all of them. |
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