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प्रश्न
Air is optically .......... than glass.
उत्तर
Air is optically rarer than glass.
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संबंधित प्रश्न
State whether the following statement is true of false:
A student says that we can see an object because light from our eyes is reflected back by the object.
What is lateral inversion? Explain by giving a suitable example.
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror
Fill in the blank and Explain the completed sentences.
The change in ______ of light rays while going from one medium to another is called refraction.
Write scientific reason.
The sun appears on the western horizon for some time after sunset.
Explain the working of a periscope.
The refractive index of a transparent medium is always greater than ______.
A star appears twinkling into the sky because of the reflection of light by the atmosphere.
Why a pencil partly immersed in water appears to be bent at the water surface.
