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New videos from Khan Academy 2021-07-21T16:07:24.161336
Actualizado: hace 4 horas 30 mins

### Fringe width in Young's double slit experiment

Mar, 2021-07-06 13:18
Fringe width is the distance between two consecutive bright spots (maximas, where constructive interference take place) or two consecutive dark spots (minimas, where destructive interference take place). Let's derive an expression for the linear and angular fringe width.

### Displacement current & Ampere Maxwell's law

Mar, 2021-07-06 12:13
Let's explore what displacement current is and how it corrects Ampere's law.

### Calculating displacement & conduction current

Mar, 2021-07-06 12:13
Let's apply Ampere Maxwell's equation to calculate the magnetic field near charging capacitor plates. The displacement current inside the wire is negligible, while that between the capacitor plates is not.

### Electric field due to dipole on the axis

Mar, 2021-07-06 11:19
Two equal and opposite charges separated by some distance constitute a dipole. The electric field strength due to a dipole, far away, is always proportional to the dipole moment and inversely proportional to the cube of the distance. Dipole moment is the product of the charge and distance between the two charges. Let's derive the expression for this field on the axis of the dipole

### Intro to torque on a dipole in uniform electric field

Mar, 2021-07-06 11:19
When an electric dipole is placed in a uniform field, it experiences a torque. This torque tries to align the dipole in the direction of the field. Let's explore more.

### Electric field due to dipole on the equator

Mar, 2021-07-06 11:19
Two equal and opposite charges seperated by some distance constitute a dipole. The electric field strength due to a dipole, far away, is always proportional to the dipole moment and inversely proportional to the cube of the distance. Dipole moment is the product of the charge and distance between the two charges. Let's derive the expression for this field on the equator of the dipole.

### Charge density & continuous charge distribution

Mar, 2021-07-06 11:19
When charges are continuously spread over a line, surface, or volume, the distribution is called continuous charge distribution. Charge density represents how crowded charges are at a specific point. Linear charge density represents charge per length. Surface charge density represents charge per area, and volume charge density represents charge per volume. For uniform charge distributions, charge densities are constant.

### Gauss law logical proof (any closed surface)

Mar, 2021-07-06 11:19
Using geometry let's prove that the Gauss law of electricity holds true for not just spheres, but any random closed surface.

### Torque on a dipole in electric field (derivation)

Mar, 2021-07-06 11:19
Let's derive the expression for the torque acting on a dipole placed in a uniform electric field. We will also explore the stable and unstable equilibrium positions.

### Electric dipoles & dipole moments

Mar, 2021-07-06 11:19
Two equal and opposite charges separated by some distance constitute a dipole. The product of the charge and distance between them is called the dipole moment. Dipole moment represents the strength of the dipole. The electric field generated by the dipole is proportional to the dipole moment. Let's explore more about dipoles and dipole moments in this video.

### Slavery at the "West Point of the Confederacy"

Lun, 2021-07-05 22:58
The Little Round House at the University of Alabama, Tuscaloosa A Seeing America video Speakers: Dr. Hilary Green and Dr. Steven Zucker Additional resources: The Hallowed Grounds Project (from Dr. Hilary N. Green)

### Stone Mountain, Georgia

Lun, 2021-07-05 22:41
Confederate Memorial, Stone Mountain, Georgia (sculptors: Gutzon Borglum, Augustus Lukeman, Julian Harris, Walter Hancock, and Roy Faulkner), completed in 1970 (corrected) A conversation with Dr. Steven Zucker and Dr. Beth Harris Warning: this video contains images of racial violence

### A body in clay, a work by Magdalene Anyango N. Odundo

Sáb, 2021-07-03 21:22
Magdalene Anyango N. Odundo, Symmetrical Reduced Black Narrow-Necked Tall Piece, 1990, terracotta, 40.6 x 25.4 x 25.4 cm (Brooklyn Museum) speakers: Dr. Peri Klemm and Dr. Steven Zucker

### Juan Patricio Morlete Ruiz, Christ Consoled by Angels

Jue, 2021-07-01 19:55
A conversation between Dr. Lauren Kilroy-Ewbank and Dr. Beth Harris in front of Juan Patricio Morlete Ruiz, Christ Consoled by Angels, 18th century, oil on copper, 84.5 x 64.5 cm (Museo Nacional de Arte, Mexico City)

### “Protractor, Variation I” by Frank Stella

Mar, 2021-06-22 17:30
“Protractor, Variation I” by Frank Stella is an acrylic and graphite painting on canvas at the Pérez Art Museum Miami. Created in 1969, the painting is 16 feet wide by 8 feet tall, and is composed of rhythmic bands of color in the shape of a protractor. This work is one of nearly 100 paintings in Stella’s Protractor series. Discover more reasons why this is a masterpiece with Franklin Sirmans, Director of the Pérez Art Museum Miami.

### Van Gogh, The Starry Night

Lun, 2021-06-21 15:48
Vincent van Gogh, The Starry Night, 1889 (June, Saint Rémy), oil on canvas, 73.7 x 92.1 cm (The Museum of Modern Art) Speakers: Dr. Beth Harris and Dr. Steven Zucker

### Public art, politics, and the banishing of Civic Virtue

Vie, 2021-06-11 18:01
Frederick MacMonnies (sculptor), Thomas Hastings (architect), Piccirilli Brothers (carvers), Civic Virtue Triumphant Over Unrighteousness, 1922, marble, more than 17 feet high (originally City Hall Park, Manhattan, then Queens Borough Hall, now Green-Wood Cemetery, Brooklyn but without fountain basins) Speakers: Dr. Michele Bogart and Dr. Steven Zucker

### Vertis Hayes, The Lynchers

Vie, 2021-06-11 17:09
Warning: this video contains graphic scenes of racial violence. Vertis Hayes, The Lynchers, 1930s, oil on canvas, 19-1/2 x 15-1/4 inches (Georgia Museum of Art, Athens) Speakers: Dr. Shawnya Harris, Larry D. and Brenda A. Thompson Curator of African American and African Diasporic Art at the Georgia Museum of Art and Dr. Beth Harris

### Josiah McElheny on Horace Pippin

Vie, 2021-06-11 17:09
Josiah McElheny on Horace Pippin "Every human being has the potential of great insight." Video by The Metropolitan Museum of Art

### The convento of Acolman

Vie, 2021-06-11 16:45
A conversation between Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker in the atrium of the ex-convento, San Agustín de Acolman, Acolman de Nezahualcóyotl, Mexico