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Wave Optics Quiz

Class XII
Physics
Wave Optics
12 questions
HARD

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Preview questions

1. What is the condition for constructive interference in a double-slit experiment?

d sin θ = (m + 0.5)λ · d sin θ = mλ · d sin θ = (m - 0.5)λ · d sin θ = mλ/2

2. In Young's double-slit experiment, if the slit separation is doubled, what happens to the fringe width?

It doubles · It halves · It remains the same · It quadruples

3. What is the wavelength of light if the first-order maximum occurs at 30° and the slit separation is 0.1 mm?

0.5 mm · 0.1 mm · 0.2 mm · 0.3 mm

4. In a thin film interference, which of the following leads to a phase change of π?

Reflection from a denser medium · Transmission through a denser medium · Reflection from a less dense medium · Transmission through a less dense medium

5. What is the effect of increasing the wavelength of light on the fringe separation in Young's experiment?

Increases fringe separation · Decreases fringe separation · No effect · Fringe separation becomes zero