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Questions and Answers
Materials that allow some small amount of light to pass through are called ______ materials.
Translucent
Materials that do not allow light to pass through them are called ______ materials.
Opaque
Light travels with a speed of 3 x 10^8 m/s in ______.
air
The term given to the property that shows how light travels in a straight line is called ______ Propagation of light.
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A collection of light rays travelling in a specific direction is called a ______.
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There are two main sources of light. They are Natural sources and ______ sources.
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An object that consists of a box painted black on the inside with a small hole at the other end is called a Pinhole ______
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The area of darkness cast on a screen when an opaque object is placed in front of a light source is called ______
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The total area of darkness cast by an opaque object between a point source of light and a screen is called ______
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The partial shadow surrounding an umbra formed by an opaque object between an external source of light and a screen is ______
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The type of eclipse that occurs when the earth comes between the moon and the sun in a straight line is called ______ Eclipse
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A kind of eclipse where only part of the earth or moon is covered is known as ______ eclipse
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The bouncing back of light when it strikes a surface is called ______ of light
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The first law of reflection states that the incident ray, the normal, and reflected ray at a point of incidence, all lie in the same ______
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The ray perpendicular to the reflecting surface during reflection of light is called ______
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A type of reflection that occurs when light rays fall on a smooth or polished surface is called Regular ______
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