Added over 4 years ago | 00:03:05 | 56549 views
A ripple tank is placed above a mirror and a projection screen. A horizontal bar, whose frequency can be varied, taps the surface of the water and produces plane waves. The waves are incident on a barrier containing an adjustable openi...
Added over 5 years ago | 00:01:11 | 50378 views
A small glass tube, held by copper wire, is placed in series with a light bulb. The glass acts as an insulator at room temperature, meaning the current cannot flow between the copper wires. This leaves an open circuit and the light bulb...
Added almost 6 years ago | 00:00:47 | 47680 views
A variable capacitor (C), large inductor or solenoid (L), and 200W light bulb (R) are connected in series to 120 VAC. The inductance of the inductor can be varied by inserting an iron core, and the capacitance can be varied by a row of ...
Added almost 5 years ago | 00:01:30 | 47114 views
Odd-shaped objects with their centers of mass marked by orange paint are thrown. While the objects appear to follow very wobbly trajectories when viewed under bright lights, under black lights you can see that their centers of mass trave...
Added over 4 years ago | 00:01:41 | 45668 views
A ripple tank is placed above a mirror and a projection screen. Two synchronous point sources, whose frequency can be varied, tap the surface of the water and produce circular waves. The interference pattern of the waves including the li...
Added over 5 years ago | 00:00:53 | 45164 views
A light bulb is placed in series with two copper plates immersed in de-ionized water. Touching the plates closes the circuit, lighting the bulb.When kosher salt is dropped into the de-ionized water, the salt dissolves, causing ions to b...
Added over 4 years ago | 00:04:27 | 44307 views
A wire frame is dipped in bubble solution and placed in front of a speaker. At certain frequencies, the soap film oscillates in symmetrical patterns called normal modes. A light is reflected off the soap film through a lens onto the wall...
Added almost 5 years ago | 00:01:19 | 43731 views
Two pucks of the same mass are slid at each other on an air table, and their resulting collisions demonstrate conservation of momentum. Notice on the first collision, for example, that when a moving puck hits a stationary puck dead-on, ...
Added 5 years ago | 00:01:10 | 41111 views
A light bulb is connected in series with a coil of very fine copper wire and a DC power supply. The voltage is adjusted so that the bulb glows dimly. When the coil is immersed in liquid nitrogen the resistance of the wire decreases causi...
Added almost 6 years ago | 00:00:57 | 38335 views
An RF transmitter is connected to a long antenna, emitting radio waves. A dipole antenna with a light bulb between its elements acts as the receiver. When the receiving antenna is parallel to the transmitter, the radio waves are absor...
Added over 5 years ago | 00:00:41 | 36173 views
A ball is dropped in front of a meter stick and lit by a strobe light. A long exposure photograph captures the position of the ball at each evenly spaced flash of light. The acceleration of the ball can then be measured from the photo. ...
Added almost 5 years ago | 00:02:25 | 35639 views
A laser is directed at an adjustable single slit and then a pinhole and the resulting diffraction patterns can be seen on a screen. A laser directed at two slits spaced closely next to each other creates an interference pattern within...
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