Wave nature, of light

Crest means the highest position to which the propagation medium rises while trough is the lowest position. (Fig. 1.7) 

Wave number. It is defined as the total number of waves which can pass through a space of one cm. It is denoted by v and is expressed in cm i. Wave number is equal to the 

Frequency. It is defined as the number of waves or cycles which can pass through a point in one second. It is denoted by the letter v (niu) and is expressed in cycles per second or in Hertz. The frequency of a radiation is inversely proportional to its wavelength, or v 1/X cm. Smaller the value of wavelength of a radiation, greater will be its frequency v = C/X where C is the constant = velocity of light = 3 x 10 ° cm sec  

Amplitude. It is the maximum height of the crest or depth of the trough. It is denoted by the Letter A 

Velocity. It is the distance covered by the waves in one second, velocity = frequency x wavelength 

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The Schrodinger equation cannot be subjected to firm proof but was put forward as a postulate, based on the analogy between the wave nature of light and of the electron. The equation was justified by the remarkable successes of its applications. 

This section reviews the evidence for the wave nature of light and of X-rays, and then puts these two forms of radiation into the context of electromagnetic radiation in general. 

Point spread function (PSF) If a tiny population of 100 nm fluorescent beads sandwiched between a coverslip and a microscope slide are examined at high resolution (i.e. at 100x objective magnification, 1.4 NA. and in a correctly matched refractive index of oil), it can actually show a tiny set of rings in the horizontal (XY) view (also called an airy disk (see Fig. below). This airy disk cannot be avoided due to diffraction and the wave nature of light. If a specimen is optically sectioned and projected in a vertical (XZ) view (see Fig. xx), a set of concentric rings will flare from the center. When a three-dimensional image of this specimen is collected, a complete point spread function is said to be recorded for each bead. The (PSF)... 

If one considers the wave nature of light, one may think that the photon size is roughly equal to its wavelength (say 500 nm) however, when the photon is absorbed by an atom, it "disappears" within a body of radius 0.5 nm this is a manifestation of the intricacies of the wave-particle duality, which are discussed in Section 3.39. 

The ray model of light is of limited usefulness. If we are to understand the fundamental processes involved in the formation of an image by a lens, we must consider the wave nature of light. The simplest form of the wave theory of light is based on a geometrical construction known as Huygens principle, which is usually stated as follows ... 

Wave Nature of Light Particle Nature of Light... 

Early hints of the wave nature of light included the seventeenth-century discovery of diffraction by Hooke and other manifestations of interference. It was obvious that dropping a rock into a pond created waves, and Boyle showed that air was necessary for the transmission of sound waves. Thus, it appeared that there had to be a medium for transmitting light waves and it was thought to be a kind... 

By 1900 the success of Maxwell s electromagnetic theory had firmly established the wave nature of light. One puzzle that remained was the distribution of wavelengths in a cavity, or blackbody the observed distribution had eluded explanation on accepted principles. In 1900 Max Planck calculated the distribution, within the experimental error, in a completely mysterious way. Planck s work proved ultimately to be the key to the entire problem of atomic structure yet at first glance it seems to have little bearing on that problem. 

Owing to the wave nature of light, diffraction at the particles aperture must be accounted for and added to the geometrical part described above. 

By the end of the 19th century, the wave nature of light and its diffraction was understood. A strip of transparent film, uniformly scored... 

Young, Thomas (1773-1829) was an English physician physicist. He could read fluently by age two and presented his first paper to the Royal Society at the young age of 20. By 1801 he was a professor at the Royal Institution in London. He was probably best known for his classic double slit experiment, which demonstrated the wave nature of light. 

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