Laser Quiz

Which of the following equations is not correct and therefore not one of Maxwells’ equations?

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?

• 
• 
• 

• 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