24 results found for physics

View Grid List
Sort A-Z By date
00:12:00

The eye and colour vision

by Joe Wolfe
The eye and colour vision
for 14-19 and upwards,
Lectures | 14-19 and upwards | 8 years ago | 1986 views
Rating:

The physics of the eye, its performance and colour vision: refraction and accommodation; photoreceptors and resolution; compromises in visual performance.

More details | Watch now
00:11:00

Geometrical optics

by Joe Wolfe
Geometrical optics
for 14-19 and upwards,
Lectures | 14-19 and upwards | 8 years ago | 1209 views
Rating:

On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.

More details | Watch now
00:12:00

The nature of light

by Joe Wolfe
The nature of light
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 1060 views
Rating:

White light comprises colours in the visible spectrum. The electromagnetic spectrum. Speed of light. Young's experiment and waves. Quanta and photons.

More details | Watch now
00:11:00

Human Sound

by Joe Wolfe
Human Sound
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 1604 views
Rating:

Sound is produced in the larynx; filtering it in the vocal tract produces formants and phonemes. The acoustics, mechanics and some neurobiology of hearing. Pitch perception.

More details | Watch now
00:09:00

Standing waves

by Joe Wolfe
Standing waves
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 1524 views
Rating:

Reflecting waves gives standing waves, which can be resonances. Standing waves on strings and in pipes and plates.

More details | Watch now
00:08:00

Interference and consonance

by Joe Wolfe
Interference and consonance
for 14-19 and upwards,
Lectures | 14-19 and upwards | 9 years ago | 1299 views
Rating:

Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.

More details | Watch now
00:09:00

Quantifying sound

by Joe Wolfe
Quantifying sound
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1356 views
Rating:

Frequency, amplitude, envelope and spectrum affect pitch, loudness and timbre. All are discussed and quantified here.

More details | Watch now
00:10:00

The Doppler effect

by Joe Wolfe
The Doppler effect
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1663 views
Rating:

Moving either source or receiver produces a frequency shift called the Doppler effect, which we measure and analyse.

More details | Watch now
00:09:00

Sound

by Joe Wolfe
Sound
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1185 views
Rating:

Sound is a longitudinal wave of variations in pressure and density. We derive and measure its speed.

More details | Watch now
00:06:00

Travelling waves II

by Joe Wolfe
Travelling waves II
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1249 views
Rating:

The wave equation and its physical origin. Power in a wave and its relation to intensity in radiation.

More details | Watch now
00:07:00

Travelling waves I

by Joe Wolfe
Travelling waves I
for 14-19 and upwards,
Lectures | 14-19 and upwards | 10 years ago | 1344 views
Rating:

In an extended medium, inertia and a restoring force can lead to waves, which reflect at boundaries, either erect or inverted.

More details | Watch now
00:09:00

Oscillations

by Joe Wolfe
Oscillations
for 14-19 and upwards,
Lectures | 14-19 and upwards | 11 years ago | 1004 views
Rating:

Inertia and restoring forces can, with low friction or damping, lead to oscillations and resonance. We analyse the mechanics of vibrations.

More details | Watch now

Items per page: