Differentiate between spontaneous and stimulated emission.
Concept: Spontaneous Emission and Stimulated Emission
⦁ Determine the magnetic field required to bend a beam consisting of electrons of speed 3 × 107 m/s in a circle of radius 5 cm.
Concept: Motion of Electron in Magnetic Field
What is a divergence of a vector field? Express it in cartesian co-ordinate system.
Concept: Scaler and Vector Field
An electron is accelerated through a potential difference of 5 kV and enters a uniform magnetic field of 0.02 `(wb)/(m^2)` acting normal to the direction of electron motion.
Determine the radius of path.
Concept: Motion of Electron in Magnetic Field
Find the divergence of vector field F=x2yz𝒊 ̅+ xz𝒋̅
Concept: Scaler and Vector Field
What is difference between Bottom up and Top Down Approach with respect to Nanotechnology.
Concept: Two Main Approaches in Nanotechnology
What will be the fringe pattern if wedge shaped air film is illuminated with white light?
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)
A wedge shaped air film having angle 40 seconds is illuminated by monochromatic light. Fringes are observed vertically through a microscope. The distance between 10 consecutive dark fringes is 1.2 cm. find the wavelength of monochromatic light used.
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)
What is population inversion? Explain it’s significance in the operation of LASER.
Concept: Spontaneous Emission and Stimulated Emission > Population Inversion
Explain how interference in wedge shaped film is used to test optical flatness of given glass plate.
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)
A wedged shaped air film having an angle of 40 seconds is illuminated by monochromatic light and fringes are observed vertically through a microscope. The distance measured between consecutive fringes is 0.12 cm. Calculate wavelength of light used.
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)
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.
Concept: Wedge Shaped Film(Angle of Wedge and Thickness Measurement)
Why the Newton’s rings are circular and centre of interference pattern (reflected) is dark?
Concept: Newton’S Rings
What is pumping in LASER? Give the types of pumping.
Concept: Spontaneous Emission and Stimulated Emission > Pumping
Show that the divergence of curl of a vector is zero.
Concept: Curl and Divergence
Why the Newton’s rings are circular and fringes in wedge shaped film are straight?
Concept: Newton’S Rings
Why the Newton’s rings are circular and fringes in wedge shaped film are straight?
Concept: Newton’S Rings
With Newton’s ring experiment explain how to determine the refractive index of liquid.
Concept: Newton’S Rings
In Newtons’s ring experiment,what will be the order of dark ring which will have double the diameter of 40th dark ring?
Concept: Newton’S Rings
Explain Newton’s ring experiment and show that diameters of nth dark rings are proportional to square root of natural numbers.
Concept: Newton’S Rings
