SATHEE: Optics 4 Question 2

Optics 4 Question 2

2. The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if $D_{m}$ is the angle of minimum deviation?

(2019 Main, 11 Jan I)

(b)

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Solution:

For a crown glass thin prism i.e., prism with small angle, the angle of minimum deviation is given as,

where, $A$ is prism angle and $n$ is refractive index.

$\Rightarrow D_{m} \propto n$

Since from the given graph, the value of ’ $n$ ’ decrease with the increase in ’ $λ$ ‘. Thus, from relation (i), we can say that, $D_{m}$ will also decrease with the increase in ’ $λ$ ‘.

$∴$ Hence, option (c) is correct.

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Optics 4 Question 2

2. The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if $D_{m}$ is the angle of minimum deviation?

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

Optics 4 Question 2

2. The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if Dm is the angle of minimum deviation?

Solution:

इंजीनियरिंग की तैयारी

चिकित्सा तैयारी

एनसीईआरटी पुस्तकें और समाधान

महत्वपूर्ण संसाधन

अन्य संसाधन

पाठ्यक्रम

परीक्षा मंच

नमूना मॉक टेस्ट

सदस्यता

एनसीईआरटी व्यायाम वीडियो समाधान

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2. The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if $D_{m}$ is the angle of minimum deviation?