Difference between photography & holography, Electrical Engineering

1.       In ordinary photography, each part contains information of the original object separately and in case some part of the object is destroyed then the information of that part of the object is also lost. How ever in case of a hologram, even the smallest par of the hologram contains complete information of the object and as such destruction of a part of hologram does not cause any harm so far as the information of the object is concerned.

2. In ordinary photograph, we cannot record many images of the different objects on a small photographic film simultaneously as we cannot get any information by superimposing number of photographs on a small film. However in case of a hologram, large number of images can be recorded simultaneously. For example a photograph of the size 6*9 mm can record one printed page while the same     size can record about three hundred such pages.

3. On a hologram, the pattern of images are formed using a particular sit of wavelets. In order to get the information from the hologram, same set of wavelets are to be used. In this way secret information can be recorded on a hologram as for decoding only the original wavelets have to be used and these are known to the person who recorded the information on the hologram.

4. These days holography has improved and holograms can be viewed by white light as well.

5. Recently coloured holograms have also been developed by Russian scientists using the coloured photography techniques.

 

Posted Date: 7/2/2012 10:09:39 PM | Location : United States







Related Discussions:- Difference between photography & holography, Assignment Help, Ask Question on Difference between photography & holography, Get Answer, Expert's Help, Difference between photography & holography Discussions

Write discussion on Difference between photography & holography
Your posts are moderated
Related Questions
I need I circuit that calculates f(n) = 2^2^n, where n is a 4bit number. I tried with a decoder but unsuccessfully.

1.   Calculate the combined resistance of three resistors connected in series with resistance of 20 ohm, 30 ohm and 40 ohm? (to achieve a pass grade, solve problems with resisto

Determine the self inductance of the two coils: Two coils with a coefficient of coupling of 0.6 between them are connected in series so as to magnetize (i) in the same directi

Explain the terms: valence band, conduction band, valence electrons, and energy gap with the help of suitable diagrams. Valence Electrons: The electrons in the outermost orbi

A 20kw 220v shunt generator has armature resistance of 0.07 and a shunt field resisitance 900 ohm find field loss?

Q. What is Open-loop voltage gain? The op amp amplifies the difference vd between the voltage on the noninverting (+) terminal and the inverting (-) terminal; see Figure. The t

Define the Signals in Time Domain? The time domain is the type of visualization that most people are familiar with. This method shows variations of a signal with time. The most

why biasing of bjt transistor is essential?

Q. What is balanced discriminator? A balanced discriminator with the corresponding frequency characteristics is depicted in Figure. The rising half of the frequency characteris

Define Sampling Frequency? Since real analog signals consist of several frequencies, spectrum of the input signals should be limited to make sure that no signal energy exists a