Relative refractive index can be:

equal to 1

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greater than 1

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smaller than 1

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All of the above.

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Solution

The correct option is D All of the above.
Relative refractive index of medium A with respect to medium B is the ratio of their absolute RI.

$_{B} μ_{A} = \frac{μ_{A}}{μ_{B}} = \frac{V_{a i r}}{V_{A}} \times \frac{V_{B}}{V_{a i r}} = \frac{V_{B}}{V_{A}} ∴_{B} μ_{A} = \frac{V_{B}}{V_{A}}$
If $V_{B} = V_{A} \Rightarrow_{B} μ_{A} = 1$
If $V_{B} > V_{A} \Rightarrow_{B} μ_{A} > 1$
If $V_{B} < V_{A} \Rightarrow_{B} μ_{A} < 1$
Hence, the correct options are A, B and C.

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Similar questions

Q. The relative refractive index of denser medium with respect to the rarer medium will be greater than 1, when light travels from rarer to a denser medium.

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Question 5
A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be:

(a) greater than unity
(b) less than unity
(c) equal to unity
(d) zero

Define the term refractive index of a medium. Can it be less than 1?

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Relative refractive index can be:

The correct option is D All of the above.Relative refractive index of medium A with respect to medium B is the ratio of their absolute RI. BμA=μAμB=VairVA×VBVair=VBVA∴BμA=VBVA If VB=VA⇒BμA=1 If VB>VA⇒BμA>1 If VB<VA⇒BμA<1 Hence, the correct options are A, B and C.