Quick practice

What does the Fermat-principle says? The path taken by light traveling from one point to another is such that...

• the distance of travel is minimum

• the time of travel is minimum

• the average of the previous two

• these two parameters does not affect it

What device can be used to split white light into its colours? (2 correct answers!)

• divergent lens

• prism

• polarizer

• optical grating

What does the diameter of the Snell's window depend on?

• the frequency of light

• the plane of oscillation of light

• the temperature of the medium

• the refractive index of the medium

How can you say nearsightedness in other words?

• presbyopia

• hypermetropia

• myopia

• emmetropia

How can the resolving power of a microscope be increased? (2 correct answers!)

• increase the index of refraction

• decrease the index of refraction

• increase the wavelength of the light

• decrease the wavelength of the light

Which phenomenon is NOT the consequence of the interaction of gamma photons and material?

• photoeffect

• pair production

• Compton-scattering

• scintillation

On which practices did we measure concentration? (2 correct answers!)

• Refractometry

• Light Emission

• Light Absorption

• Microscopy II.