(C) When a light ray is incident normally (at an angle of $90^{\circ}$ to the surface) on the interface of two media,the angle of incidence $(i)$ is $

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It passes in the same direction without refraction.

(C) When a light ray is incident normally (at an angle of $90^{\circ}$ to the surface) on the interface of two media,the angle of incidence $(i)$ is $0^{\circ}$.According to Snell's Law,$n_1 \sin(i) = n_2 \sin(r)$.Since $\sin(0^{\circ}) = 0$,it follows that $\sin(r) = 0$,which means the angle of refraction $(r)$ is also $0^{\circ}$.Therefore,the light ray passes through the glass slab without any deviation or bending.

Class 10 Science Light – Reflection and Refraction Mix Examples - Light – Reflection and Refraction

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What happens when a light ray incident normally on the surface of a glass slab enters from air into the glass?

A
The angle of refraction is greater than the angle of incidence.
B
The angle of refraction is smaller than the angle of incidence.
C
It passes in the same direction without refraction.
D
It undergoes total internal reflection.

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Light – Reflection and Refraction

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Mix Examples - Light – Reflection and Refraction

You have a spherical mirror. The image of an object placed in front of the mirror is virtual. If the position of the object is changed,the image remains virtual and erect. Is the spherical mirror concave or convex?

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The rays travelling parallel to the principal axis after reflecting from the concave mirror pass or appear to pass through the focus.

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$(a)$ What is meant by refraction of light?
$(b)$ If on applying Cartesian sign convention for spherical lenses the image distance obtained is negative,state the significance of the negative sign.

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State the sign convention used to measure distances from a mirror.

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When light of two colours $A$ and $B$ is passed through a plane boundary; $A$ is bent more than $B$. Which colour travels more slowly in the second medium?

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What happens when a light ray incident normally on the surface of a glass slab enters from air into the glass?

Similar Questions

You have a spherical mirror. The image of an object placed in front of the mirror is virtual. If the position of the object is changed,the image remains virtual and erect. Is the spherical mirror concave or convex?

The rays travelling parallel to the principal axis after reflecting from the concave mirror pass or appear to pass through the focus.

$(a)$ What is meant by refraction of light?$(b)$ If on applying Cartesian sign convention for spherical lenses the image distance obtained is negative,state the significance of the negative sign.

State the sign convention used to measure distances from a mirror.

When light of two colours $A$ and $B$ is passed through a plane boundary; $A$ is bent more than $B$. Which colour travels more slowly in the second medium?

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$(a)$ What is meant by refraction of light?
$(b)$ If on applying Cartesian sign convention for spherical lenses the image distance obtained is negative,state the significance of the negative sign.