Photo Researchers ftp March 2011

The beach at Font Hill Beach Park & wildlife sanctuary, in Jamaica.

View off a tour boat, traveling up the Black River to see the region's wildlife, in particular the crocodiles, in the mangrove swamps. This area is p...

Lover's Leap, in St Elizabeth Parish, on the southwest coast of Jamaica. Lovers Leap is a 1700 ft cliff, named after two 18th century slave lovers wh...

Coast at Treasure Beach, in Jamaica.

Coast at Treasure Beach, in Jamaica.

Photovoltaic solar panels on top of a public parking structure in Mountain View, California. Besides generating renewable power for the structure, th...

US Postal Service Priority Mail envelope made from recycled paper.

US Postal Service Priority Mail envelope made from recycled paper.

LDPE, (low-density polyethylene), is commonly recycled. It is labeled as "4" in the SPI resin identification coding system. Photographed here is an e...

FlexFuel badge on a Chrysler vehicle; Southern California, USA. FlexFuel vehicles can run on either a conventional gasoline or an E85 ethanol fuel, (...

Solar-powered trash compactor by BigBelly. The unit has about the same size as an ordinary trash receptacle but its capacity is five times greater....

Solar-powered trash compactor by BigBelly. The unit has about the same size as an ordinary trash receptacle but its capacity is five times greater....

Pressure gauge dial with marking in psi, (pound per square inch), and MPa, (Mega Pascal).

A Bourdon pressure gauge uses a coiled brass tube as the pressure sensing element. When the pressure is increased, the tube uncoils, causing rotation...

A Bourdon pressure gauge uses a coiled brass tube as the pressure sensing element. When the pressure is increased, the tube uncoils, causing rotation...

Hand holding a variety of components used in electronic circuits: inductors, capacitors, resistors, transistors, diodes and integrated circuits.

Resistors mounted on a printed circuit board.

An integrated circuit, (IC), mounted on a printed circuit board. (PCB).

Different types of resistors are used in electronic circuits. Back: vitreous enamel wirewound high-power (225 W) resistor. Front, left to right: alu...

Different types of capacitors use a variety of materials in their construction. From left to right, front row: polyester film capacitor, polypropylene...

Needles of small compasses align along the magnetic field lines produced by an ALNICO bar magnet.

Needles of small compasses align along the magnetic field lines produced by an ALNICO bar magnet.

Iron shavings are used to reveal magnetic field lines produced by an ALNICO bar magnet.

Iron shavings are used to reveal magnetic field lines produced by an ALNICO bar magnet.

Iron shavings are used to reveal magnetic field lines produced by an ALNICO bar magnet.

Iron shavings are used to reveal magnetic field lines produced by an ALNICO bar magnet.

Iron shavings are used to reveal magnetic field lines produced by an ALNICO bar magnet.

Opposite poles of two bar magnets attract each other. Iron shavings are used to reveal magnetic field lines produced by the two ALNICO magnets.

Like poles of two bar magnets repel each other. Iron shavings are used to reveal magnetic field lines produced by the two ALNICO magnets.

Like poles of two bar magnets repel each other. Iron shavings are used to reveal magnetic field lines produced by the two ALNICO magnets.

Opposite poles of two bar magnets attract each other. Iron shavings are used to reveal magnetic field lines produced by the two ALNICO magnets.

Iron shavings are used to reveal magnetic field lines produced by a horseshoe magnet.

Iron shavings are used to reveal magnetic field lines produced by a horseshoe magnet.

Different types of resistors are used in electronic circuits. Back: vitreous enamel wirewound high-power (225 W) resistor. Center: five tiny SMT (su...

Batteries of different types and sizes. From left to right, back: alkaline size AA cell, alkaline size D cell, 6 V carbon zinc battery, alkaline size...

A simple electromagnet is constructed by coiling a length of wire around an iron nail. When electric current is passed through the wire, a magnetic f...

A simple electromagnet is constructed by coiling a length of wire around an iron nail. When electric current is passed through the wire, a magnetic f...

A simple electromagnet is constructed by coiling a length of wire around an iron nail. When electric current is passed through the wire, a magnetic f...

An alkaline PP3 (9-volt) battery consists of 6 cylindrical cells connected in series, as shown on the right. The dissected battery cover is on the le...

Positive semi-circular cylindrical lens focusing light rays.

Positive semi-circular cylindrical lens focusing light rays.

Positive semi-circular cylindrical lens focusing light rays.

Positive semi-circular cylindrical lens focusing light rays.

An aluminum electrolytic capacitor has two aluminum foils and a paper spacer soaked in electrolyte. This stack is rolled up to conserve space, fitted...

Shown here is an aluminum electrolytic capacitor. Photo 2 of 2. Photo 1 shows this capacitor disassembled.

Labels on a consumer electronics package. Shown here are the European Waste Electrical and Electronic Equipment (WEEE) label and the CE mark.

A moebius strip or moebius band is a surface that has only one side and one edge. A model moebius band is created by taking a paper strip, half-twisti...

Photographed here are 4 cylinders of the same shape and equal volume that are made out of different materials. Left to right: aluminum, glass, wood (o...

A camera flash with its cover removed. Visible are the circuitry, the capacitor for storing electric energy (black cylinder) and the lamp reflector.

An AC power adapter is used for powering small electric and electronic appliances. It contains an electrical transformer that makes use of the Faraday...