Rectilinear Propagation of Light
Physics ⇒ Light and Optics
Rectilinear Propagation of Light starts at 7 and continues till grade 12.
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See sample questions for grade 11
A light source, an opaque object, and a screen are arranged in a straight line. What will be observed on the screen?
A small opaque object is placed in the path of a narrow beam of light. What will be observed on a screen placed behind the object?
A student observes that the shadow of a tree is sharp at noon but blurred in the evening. Explain why.
Describe an experiment to demonstrate the rectilinear propagation of light using three cardboards with holes.
Describe the difference between umbra and penumbra.
Describe what happens to the shadow of an object as the size of the light source increases.
Explain why a pinhole camera produces an inverted image.
Explain why a solar eclipse occurs only when the Sun, Moon, and Earth are in a straight line.
Explain why the shadow of an object is not formed when the object is placed very close to a very large light source.
Explain why we cannot see around corners even though there is light present.
If three cardboards with holes in the center are placed in a straight line and a light source is placed behind them, what will you observe on the screen placed after the third cardboard?
State the law of rectilinear propagation of light.
Why does a shadow become longer in the early morning and late afternoon?
A laser beam is directed through a tank filled with water containing a small amount of milk. The path of the beam is visible inside the tank but not outside. Explain how this observation supports the rectilinear propagation of light.
A narrow beam of light passes through a series of holes in four opaque screens placed in a straight line. If the third screen is slightly shifted sideways, what will be observed on the fourth screen?
A student claims that the rectilinear propagation of light is violated when light passes through a prism and bends. Critically analyze this statement.
Describe how the rectilinear propagation of light is essential for the operation of optical instruments such as telescopes and microscopes.
Explain, with reference to the rectilinear propagation of light, why a person standing behind a wall cannot see a candle placed on the other side of the wall.
