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Questions and Answers
What happens to the fringe pattern when a thin film of mica or glass is placed in the path of one of the waves in Young's Double Slit Experiment?
What happens to the fringe pattern when a thin film of mica or glass is placed in the path of one of the waves in Young's Double Slit Experiment?
- The fringe pattern disappears.
- The fringe pattern remains unchanged.
- The fringe pattern gets shifted towards the slit in front of which the glass plate is placed. (correct)
- The fringe pattern gets shifted away from the slit in front of which the glass plate is placed.
What is the condition for constructive interference in reflected light?
What is the condition for constructive interference in reflected light?
- Δ = (2n + 1) λ/2
- Δ = (2n - 1) λ
- Δ = (2n) λ
- Δ = (2n - 1) λ/2 (correct)
What is the shift of the fringe pattern equivalent to?
What is the shift of the fringe pattern equivalent to?
- n/2 fringes
- n fringes (correct)
- nλ
- nλ/2
What is the condition for destructive interference in refracted light?
What is the condition for destructive interference in refracted light?
What is the effect of incidence angle on the shift of the fringe pattern?
What is the effect of incidence angle on the shift of the fringe pattern?
What is the condition required for the screen to be placed at a large distance for Fraunhoffer diffraction?
What is the condition required for the screen to be placed at a large distance for Fraunhoffer diffraction?
What is the path difference between the diffracted waves for obtaining n secondary minima at P on the screen?
What is the path difference between the diffracted waves for obtaining n secondary minima at P on the screen?
What is the angular position of the n secondary minima in terms of the slit width b and wavelength λ?
What is the angular position of the n secondary minima in terms of the slit width b and wavelength λ?
What is the condition for obtaining n secondary maxima at P on the screen in terms of the wavelength λ and slit width b?
What is the condition for obtaining n secondary maxima at P on the screen in terms of the wavelength λ and slit width b?
What happens to the width of the central diffraction maxima and secondary maxima as the slit width increases relative to the wavelength?
What happens to the width of the central diffraction maxima and secondary maxima as the slit width increases relative to the wavelength?
What is the condition for the formation of a bright fringe in a diffraction grating?
What is the condition for the formation of a bright fringe in a diffraction grating?
What is the path difference between each ray that emerges from each slit at an angle θ in a diffraction grating?
What is the path difference between each ray that emerges from each slit at an angle θ in a diffraction grating?
What is the angular width of the central maximum in a diffraction pattern?
What is the angular width of the central maximum in a diffraction pattern?
What is the phase difference between the wavelets originating from two consecutive HPZ's and reaching the point P in a diffraction grating?
What is the phase difference between the wavelets originating from two consecutive HPZ's and reaching the point P in a diffraction grating?
What is the linear width of the central maximum in a diffraction pattern?
What is the linear width of the central maximum in a diffraction pattern?
What is the speed of electromagnetic waves in free space?
What is the speed of electromagnetic waves in free space?
What is the energy density of an electric field?
What is the energy density of an electric field?
What is the wave impedance of a medium?
What is the wave impedance of a medium?
What is the intensity of an electromagnetic wave?
What is the intensity of an electromagnetic wave?
What is the total energy per unit volume of an electromagnetic wave?
What is the total energy per unit volume of an electromagnetic wave?
What was the limitation of Ampere's law as explained by Maxwell?
What was the limitation of Ampere's law as explained by Maxwell?
What was the purpose of earthing one terminal of the spark gap in Marconi's experiment?
What was the purpose of earthing one terminal of the spark gap in Marconi's experiment?
What was the name given by Maxwell to the hypothetical current flowing between the capacitor plates during charging?
What was the name given by Maxwell to the hypothetical current flowing between the capacitor plates during charging?
What was the purpose of the wires connecting the spheres S and S' to the plates in Hertz's experiment?
What was the purpose of the wires connecting the spheres S and S' to the plates in Hertz's experiment?
What was the limitation of Hertz's experiment in producing electromagnetic waves?
What was the limitation of Hertz's experiment in producing electromagnetic waves?
What is the physical phenomenon that occurs when a high voltage is applied across metallic plates?
What is the physical phenomenon that occurs when a high voltage is applied across metallic plates?
What is the equation that relates the frequency of electromagnetic waves to the inductance and capacitance of an LC oscillator?
What is the equation that relates the frequency of electromagnetic waves to the inductance and capacitance of an LC oscillator?
Who is credited with predicting the existence of electromagnetic waves?
Who is credited with predicting the existence of electromagnetic waves?
What is the nature of electromagnetic waves?
What is the nature of electromagnetic waves?
What is the law that relates the electric flux to the charge enclosed by a surface?
What is the law that relates the electric flux to the charge enclosed by a surface?
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