NEW
Font size
WorksheetsLaser Quiz
Total questions: 18
Worksheet time: 27mins
Which of the following equations is not correct and therefore not one of Maxwells’ equations?
∇D=ρ
∇×H=∂t∂D+J
∇×E=−∂t∂∇B
∇B=0
Determine the energy of a photon with a wavelength of λ = 800 nm?
0.7 eV
1.5 eV
7 eV
4 keV
In which direction will the beam be refracted?
A
B
C
D
Which of the following statements is wrong?
Metallic mirrors reflect light independent of the incident angle.
Dielectric mirrors reflect light independent of the incident angle.
The reflection of metallic mirrors is constant across a broad spectral range.
The reflectivity of gold at 450nm is smaller than of silver.
How can one change the polarisation by 90° (i.e. from s to p-polarized light)?
Half wave plate, optical axis between s and p
Half wave plate, optical axis along s
Half wave plate, optical axis along p
Quarter wave plate, optical axis along s
Quarter wave plate, optical axis along p
How can one avoid spherical abberation when imaging with plan convex and plan concave lenses?
Planar side of lens to focus
Doesn’t matter
Curved side of lens to focus
What is the transfer matrix for a beam after propagation through a thin lens and a following propagation through air with distance L?
In the model for the description of the susceptibility of a medium, the harmonic oscillator model is applied. What is Γ representing herein?
The eigenfrequency
The damping constant
The excitation frequency
In the Harmonic Oscillator model with a negative charge excited by an electric field a phase difference between the exciting and the reemitted field is found. What is this phase difference for the case being in resonance?
+90° out of phase
-90° out of phase
180° out of phase
After propagation through a medium with the refractive index n=n‘+in‘‘ some parameters of the light changes. What is kept constant?
Frequency
Wavelength
Amplitude
Velocity
The Einstein coefficients describe the interaction between photons and a 2/3/4 level system. Why is there a distinction between the coefficients A and B?
Interaction/No interaction with an external photon
Absorption / Emission process
By accident
When is population inversion reached in a 3 level system?
Never
Always
At the saturation intensity
Determine the distance in frequency space for two longitudinal modes in a resonator (i.e. the free spectral range)?
3Lc
c⋅2L
L⋅2c
2Lc
Where along the z-axis of a Gaussian beam is the position with the smallest radius of curvature of the wavefront?
In the far-field of the beam
At the Rayleigh length
In the focus of the beam
For the jubilee of our university the dove of peace should have been illuminated from the Wechloy campus to the Uhlhorns campus using a green laser. The distance is 1.5km. Assume that the beam divergence of the beam is θ=1mrad. Calculate how large the beam will be at the face of the main building at the Uhlhornsweg approximately?
1.5cm
1.5 m
15 cm
Which of the following four numbers represent the position of a hemispherical resonator in the stability diagram?
1
2
3
4
Which of the shown transversal modes are possible for a laser beam??
Only the TEM00 mode
Only the round modes (upper half)
In principle all
Which of the following cavities are stable?
(1) and (4)
(2) and (6)
(3) and (4)
(1) and (3)
