17 results found for optics

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00:35:00

The International Year of Light: Celebrating Fifty Years of Laser Revolution in Physics

by Serge Haroche
The International Year of Light: Celebrating Fifty Years of Laser Revolution in Physics
for 18-22 y hacia arriba,
Charlas | 18-22 y hacia arriba | 8 years ago | 1310 views
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The year 2015 has been named the International Year of Light, to mark milestones in the science of light which occurred 1000, 200, 150, 100 and 50 years go. I was a young student in physics in 1965, when the cosmic radiation background was discovered....

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01:04:00

Communicating with light

by Polina Bayvel
Communicating with light
for 14-19 and upwards,
Charlas | 14-19 and upwards | 9 years ago | 1381 views
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Most of the data we generate and receive (whether emails, tweets, videos or mobile calls) are now carried by optical fibres, which use light to transmit vast quantities of information over trans-oceanic distances. The use of hundreds of wavelengths ....

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00:31:00

From Millisecond to Attosecond Laser Pulses

by Nicolaas Bloembergen
From Millisecond to Attosecond Laser Pulses
for 18-22 y hacia arriba,
Charlas | 18-22 y hacia arriba | 9 years ago | 1527 views
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A historical overview is presented of the experimental development of ever shorter laser pulses from 1960 to the present. Already in the early sixties nanosecond pulses were achieved and the entry into the picosecond domain was reached in the late s....

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00:32:00

The Optical Frequency Comb – a Really Versatile Tool

by John Hall
The Optical Frequency Comb – a Really Versatile Tool
for 18-22 y hacia arriba,
Charlas | 18-22 y hacia arriba | 9 years ago | 1387 views
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The Optical Frequency Comb concept and technology exploded in 1999-2000 from the synthesis of advances in independent fields of Laser Stabilization, UltraFast Lasers, and NonLinear Optical Fibers. The Comb was developed first as a method for optical....

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01:18:00

What is Quantum Optics?

by Roy Glauber
What is Quantum Optics?
for 18-22 y hacia arriba,
Charlas | 18-22 y hacia arriba | 9 years ago | 3698 views
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The image of light waves as oscillating electromagnetic fields explains virtually all the phenomena of traditional optics.  An awareness that these waves are somehow subdivided into quanta has however been with us since the early 20th century.  The....

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00:05:00

The Fresnel Lens

by Jonathan Hare
The Fresnel Lens
for 14-19 and upwards,
Charlas | 14-19 and upwards | 10 years ago | 1473 views
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Early lighthouses used coil and wood fires before moving on to gas and then electricity powered lights.  Massive improvements took place by using a lens system around the light.  The development of the Fresnel lens brought what we now regard as the....

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00:12:00

The eye and colour vision

by Joe Wolfe
The eye and colour vision
for 14-19 and upwards,
Charlas | 14-19 and upwards | 11 years ago | 2421 views
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The physics of the eye, its performance and colour vision: refraction and accommodation; photoreceptors and resolution; compromises in visual performance.

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00:11:00

Geometrical optics

by Joe Wolfe
Geometrical optics
for 14-19 and upwards,
Charlas | 14-19 and upwards | 11 years ago | 1627 views
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On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.

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00:12:00

The nature of light

by Joe Wolfe
The nature of light
for 14-19 and upwards,
Charlas | 14-19 and upwards | 11 years ago | 1546 views
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White light comprises colours in the visible spectrum. The electromagnetic spectrum. Speed of light. Young's experiment and waves. Quanta and photons.

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01:08:00

Optical science in the fast lane

by Wileon Sibbett
Optical science in the fast lane
for 18-22 y hacia arriba,
Charlas | 18-22 y hacia arriba | 14 years ago | 1455 views
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In this talk Wilson Sibbett introduces some of the underlying concepts that have enabled us to develop practical ultrafast lasers and a selection of applications that range from the fundamentals of chemical bonding to weapons decommissioning!

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00:05:00

Light

by Shalini Golla
Light
for 14-19 and upwards,
Presentaciones de estudiantes de primaria | 14-19 and upwards | 14 years ago | 1552 views
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Shalini Golla presents on the science behind light.

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00:05:00

Light Beam

by Jonathan Hare
Light Beam
for 14-19 and upwards,
Charlas | 14-19 and upwards | 15 years ago | 1944 views
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Light is reflected off a flexible shiny surface fixed to the end of a plastic tube. When one speaks into the tubes sound vibrations pass down the tube and make the surface vibrate. The reflected light is therefore sent off from the surface in a con....

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