Due to refraction,

Image in the plane mirror is clear

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Polished black surfaces shine

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speed of light is constant in all mediums

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A glass sphere appears attractive

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Solution

The correct option is C A glass sphere appears attractive
Due to refraction from glass, light coming out gives a sparkling effect in glass sphere.

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List the sign conventions for reflection of light by spherical mirrors. Draw a diagram and apply these conventions in the determination of focal length of a spherical mirror which forms a three times magnified real image of an object placed 16 cm in front of it.
OR
State the law of refraction of light that defines the refractive index of a medium with respect to the other. Express it mathematically. How is refractive index of any medium 'A' with respect to a medium 'B' related to the speed of propagation of light in two media A and B? State the name of this constant when one medium is vacuum or air.

The refractive indices of glass and water with respect to vacuum are $\frac{3}{2}$ and $\frac{4}{3}$ respectively. If the speed of light in glass is $2 \times 10^{8} m / s$ , find the speed of light in (i) vacuum, (ii) water.

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Due to refraction,

The correct option is C A glass sphere appears attractiveDue to refraction from glass, light coming out gives a sparkling effect in glass sphere.

The correct option is C A glass sphere appears attractive
Due to refraction from glass, light coming out gives a sparkling effect in glass sphere.