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How are light waves different from sound waves?

light waves are an oscillation of a magnetic field, while sound waves are an oscillation of the material through which the sound travels

both light and radio waves are an oscillation of an electric and magnetic field; how do they differ?

radio waves oscillate more slowly

Without using specialized instruments, can we detect if two light rays have the same frequency? If so, how?

If the difference is pronounced, our eyes will be able tell because the two frequencies will manifest as two different colors

Without using specialized instruments, can we detect if two light rays have the same polarization? If so, how?

No; our eyes can’t distinguish polarization

What is the defining property of laser light and why?

Coherence — all photons of one of its waves are in sync with each other

What does laser stand for?

Light amplification by stimulated emission of radiation

Why do we make transfer holograms?

So we can display holograms without lasers, so that we can bring the holographic image closer to and make it pop out of the plate, and in order to make rainbow holograms

What is the difference between a multi-channel hologram that captures something real and a digital hologram?

The images in digital holograms are 2D and tend to be separated between far more channels

What limits the parallax in a transfer hologram?

the size of the master hologram and the distance between master and transfer holograms

What are two ways to make a blue hologram with a green laser?

Make a rainbow hologram and angle it so that the image looks blue or make a reflection hologram and use a chemical process to shrink the emulsion after recording

What are some monocular depth clues?

Motion parallax, motion, perspective, relative size, texture gradient, defocus blur, lighting and shading, occlusion, accommodation, aerial perspective

What are some binocular depth clues?

Stereopsis or retinal disparity, where the image in each eye will be slightly different, and convergence (the angle between our eyes in near objects)

Why do holograms look 3D?

because they reproduce all the light rays from their subjects in their original position and direction

What depth clues are most important for holography?

Motion parallax and retinal disparity

How does a moving slit assembly produce holograms?

It records images which show the subject at slightly different angles, each occupying a small sliver of space on the plate, which can then only be played back in the direction they were recorded in

Why wouldn’t you want to use a moving slit assembly to produce holograms?

It’s difficult to collect that many perspectives on an image, and the process is slow and doesn’t allow for vertical parallax

Can rainbow holograms be displayed effectively with single-color light?

No

Can reflection master holograms be made?

Yes

Can non-laser light diffract?

Yes

What is microscopically different between reflection and transmission holograms?

The orientation of the fringes in the emulsion

Can you record a hologram on a cell phone?

No

Are holograms on money and credit cards more similar to transmission or reflection holograms?

Transmission, even though light reflects from them

Do holographic emulsions with smaller grains require more or less light to expose?

more

Do developer chemicals change the stiffness of the emulsion in order to reveal the recorded image?

No

Must the bleaching of holograms be done in complete darkness?

No

How are full-color digital holograms recorded?

As three reflection holograms in one

Do reflection holograms that capture physical subjects have vertical parallax?

yes

Do digital reflection holograms have vertical parallax?

No

Should an object beam or reference beam be brighter?

Reference beam

Do our master holograms use the same beam-power ratio as our rainbow holograms?

Yes

Is our moving slit assembly used to make master or transfer holograms?

Master

Is the motion of the camera in Blender necessary to render moving images in our digital holograms?

No

Can you produce a master hologram that appears to be half in front and half behind the holographic film?

No

Can interference be used to measure small amounts of motion?

Yes

What happens when reference and object beams interfere?

A standing wave pattern of bright/dark stripes is produced

What causes diffraction grating?

The bright areas of the pattern produced by the interference of the reference and object beams produce a chemical change in the film

How is an object beam reproduced?

Light passing through the diffraction grating changes angles (diffracts)