Color Laser Light light from a laser is directed at a caesium surface?
the minimum photon energy required to eject the electrons from the caesium is 2.14eV. when caesium is illuminated with light from the laser photoelectrons are emitted with a maximum kinetic energy of 0.76eV. you may assume that the planck constant,h, is 4.14 x 10¬15eV Hz¬1.
i) calculate the energy of the photons comprising the light from the laser.
ii) state the colour of the light from the laser.
E=hf-W
Energy is equal to Planck's constant times the frequency of incident light minus the work function of the material (the minimum amount of energy required to free electrons).
L308RG 120mw RG Color Laser Light from Lanling Tech
Best Entry Level Color Laser Printers of 2007
Entry level printers can mean a lot of things for the average user. Some would say that entry level printers are in a class of affordable machines for start up users. Another segment may say that entry level printers should be easy to use and should not scare away a potential power-user. These qualities are true for budding professional photographers and office managers. Therefore, this cool list of starter sums the best get-to-know-me printers.
HP Photosmart C5280 Multifunction Printer
If you are on a tight budget, the HP Photosmart C5280 Multifunction Printer is a great do-it-all printer for you. The clean white printer dishes out professional photo prints and great color scan quality, which is a combination that higher end printers should also bring. It also prints at a lower cost per page, and with the Roxio label printer, home users can create their custom CD labels from their HP Photosmart C5280 Multifunction Printer. Its stock of printer inks such as HP #74 ink (CN335WN) also features high yield printing. While you might experience diminished text quality, and while the photo menus need a revamp, the HP Photosmart C5280 Multifunction Printer excellent graphic printing judged against its cost makes it a nice match for the casual home user.
Canon Selphy CP740
The Canon Selphy CP740 is a perfect entry level photo printer used for a variety of task at a highly acceptable quality. The white light box is compact enough to be carried in a tote bag or a large purse. At 2.1 pounds, you can carry the Canon Selphy CP740 anywhere. The main praise for Canon Selphy CP740 is its ease of use and low cost for people who want to take various snapshots and get their print outs quick. The Canon Selphy CP740 is a nice companion for the simple in and out printer that does not complicate much.
HP Photosmart A826
If you can shell out some money, you will be delighted with the ease of using the HP Photosmart A826. The little blue box looks straight out from a spaceship as with its trapezoid shape and blue lid. The large touch screen can be used to display slide shows while the menus are organized so that anyone can get a printing job done without opening the manual. If you can bite the price, the trade-off with its ease of use and quality prints from the HP Photosmart A826 makes it a fair buy. Replacement printer ink cartridge also dampens your printer cost as long as you buy discount HP 110 (CB304AN#140) printer ink cartridges.
Canon Pixma iP1800
The Canon Pixma iP1800 printer is a bare bones printer that does the most basic things while it charges you at a modest price. For $50 can get a useful printer equipped with a paper feeder, a dual printer ink cartridge system, and a USB port for universal connectivity. The Canon printer ink cartridge replacements are not that pricey with remanufactured Canon CL41 for color printing and the Canon PG40 for black printing.
If you look at it purely as an entry level printer, the Canon Pixma iP1800 will definitely not disappoint. However, you won't get an output tray for its price but it does the starter things very well and will be a good standard for your next printer needs.
AAXA Technologies announced AAXA L1 v2 Laser Pico Projector which claimed to be a version 2 of the world’s first laser powered pocket projector. This improves upon the first by increasing thermal efficiency of its PCOS laser light engine. Now only do you get color, this device’s three-color laser light source enables it to produce [...]
AAXA Technologies announced AAXA L1 v2 Laser Pico Projector which claimed to be a version 2 of the world’s first laser powered pocket projector. This improves upon the first by increasing thermal efficiency of its PCOS laser light engine. Now only do you get color, this device’s three-color laser light source enables it to produce [...]