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Important Questions for BE Computer Engineering Semester 2 (FE First Year) - University of Mumbai - Applied Physics 2

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Explain Newton’s ring experiment and show that diameters of nth dark rings are proportional to square root of natural numbers.

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Newton’S Rings

What is antireflection coating? What should be the refractive index and minimum thickness of the coating?

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Interference in Thin Film of Constant Thickness Due to Reflected and Transmitted Light

A parallel beam of light of wavelength 5890 A0 is incident on a glass plate having refractive index 𝝁=𝟏.𝟓 such that the angle of refraction in the plate is 600. Calculate the smallest thickness of the glass plate which will appear dark by reflected light.

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)

With the help of proper diagram and necessary equation, explain how Newtons ring experiment is useful to determine the radius of curvature of plano convex lens. In a newton rings experiment the diameter of 5th dark ring is 0.336 cm and the diameter of 15th ring is 0.590 cm. Find the radius of curvature of plano convex lens if the wavelength of light used is 5890 A0.

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Newton’S Rings

What is diffraction grating and grating element? Explain experimental method to determine the wavelength of the spectral line using diffraction grating?

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Diffraction Grating

Derive the condition for absent spectra in grating.

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Diffraction Grating

A newtons rings setup is used with a source emitting two wavelength λ1=6000A0 and λ2=4500 A0. It is found that nth dark ring due to 6000A0 coincides with (n+2)th dark ring due to 4500 A0. If the radius of curvature of the lens is 90 cm, find the diameter of nth dark ring of 6000A0.

Appears in 1 question paper
Chapter: [7] Interference and Diffraction of Light
Concept: Newton’S Rings

What is pumping in LASER? Give the types of pumping.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission > Pumping

Explain construction and working of Nd: YAG laser. 

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission > Nd:Yag Lase

What is holography? Differentiate between holography and photography.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser > Holography (Construction and Reconstruction of Holograms)

What is population inversion? Explain it’s significance in the operation of LASER.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission > Population Inversion

Explain construction and working of He:Ne laser with neat label diagram. 

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser > Holography (Construction and Reconstruction of Holograms)

Explain the construction and reconstruction of hologram with neat diagram. 

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser > Holography (Construction and Reconstruction of Holograms)

Differentiate between spontaneous and stimulated emission.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission

What is the difference between photography and holography?
Explain holography technique to obtain 3D image of an object. 

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser > Holography (Construction and Reconstruction of Holograms)

Explain construction and working of Nd:YAG LASER. 

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission > Nd:Yag Lase

Write difference between LED and Laser Diode.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser

With a neat energy level diagram describe the construction and working of He-Ne Laser. What are the merits and demerits?

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Applications of Laser

Differentiate between spontaneous and stimulated emission.

Appears in 1 question paper
Chapter: [8] Lasers
Concept: Spontaneous Emission and Stimulated Emission

Calculate the V number of an optical fibre having numerical aperture 0.25 and core diameter 20 μm, if its operating wavelength is 1.55 μm. 

Appears in 1 question paper
Chapter: [9] Fibre Optics
Concept: Total Internal Reflection
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