Assertion :A solid glass sphere is placed in air. A light ray entres into the sphere from outside. The ray cannot undergo total internal reflection inside the sphere . Reason: The angle of incidence at $1^{s t}$ surface cannot be greater than the critical angle for air-glass system

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
The conditions for total internal reflection are:
1.light is travelling from an optically denser medium (higher refractive index) to an optically less dense medium (lower refractive index).
2.the angle of incidence is greater than the critical angle.

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Similar questions

Q. Choose the correct option for the given assertion and reason.
Assertion: Two plane mirrors kept at right angle deviate any ray of light by

180^{\circ}

after two successive reflections.
Reason: The above condition is satisfied only for angle of incidence,

i = 45^{\circ}

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Assertion (A) Bond angle in ethers is slightly less than the tetrahedral angle.
Reason (R) There is a repulsion between the two bulky (- R) groups.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :A solid glass sphere is placed in air. A light ray entres into the sphere from outside. The ray cannot undergo total internal reflection inside the sphere . Reason: The angle of incidence at 1st surface cannot be greater than the critical angle for air-glass system

Assertion :A solid glass sphere is placed in air. A light ray entres into the sphere from outside. The ray cannot undergo total internal reflection inside the sphere . Reason: The angle of incidence at $1^{s t}$ surface cannot be greater than the critical angle for air-glass system