Optics Answers

Towards a linearly polarized light a half-wave plate is placed. The plane of oscillation of the incident light makes an angle with the optical axis of the plate. How to determine the polarization of light passing through the plate?

How should we cut the prism of an uniaxial crystal in such a way that with the help of the method of least deviation of the refracted beam to measure a common n̥0 and an uncommon ne refractive indices of the crystal?

In the process of measuring the refractive indices of the crystal plate on the crystal-refractometer it was discovered that one of the refractive indexes remains constant at every turn of the glass hemisphere. Another refractive index changes in such a a way that the value of it is 1) maximal 2) minimal. The optical sign of the crystal and the orientation of a plate relative to the optical axis need to be identified.

With the help of condensing lens one can light up a cigarette, focusing straight sun light on it. Is it possible to do the same, having an appropriate lens (for example, objective of a huge astronomical telescope), with the help of full Moon light?

Will the resolving force and dispersion area of grating diffraction change, fixing motionless a tube, into which are observed diffraction spectrum, close next nearest slits of grating?

What fringe pattern will be observed under illumination by homogeneous light of two crossed plates Lummer- Herke, that is, two plates positioned on each other along straight line, but turned relatively to each other by 90°.

Performing of taking pictures of deleted objects with the help of telescope objective on photographic plate, placed into its focal plane. Received picture with the help ocular from the same telescope is projected on deleted screen. What angle magnification of telescope should be that at the same time was fully used resolving power of the telescope objective? Picture on the screen is examined from the place where projector is fixed.

One of the crucial possible methods of increase of resolution ability radio system application for observation of radiation of space mass means to use diffraction maximum intensity of radiation, which appears in the center of geometric shadow of the moon from doted source. Evaluate resolving capacity of this method, find minimal angle resolving distance for the same length of waves. Discuss a possibility of implementation of the method. Moon diameter D=3470km.

When does the angle of incidence equal the angle of refraction?

Why, sitting by the bonfire, we see the objects on the other side of the fire, shimmering? Why, when measuring the height of a celestial body above the horizon, we find it bigger than it really is?