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What else can I help you with?
What are the functions of projector?
The function of an overhead projector is to show information on a screen using transparencies. Everything on the transparency had to be first printed backwards so that it would show on the screen in the right order.
What are the functions of overhead projector?
The function of an overhead projector is to show information on a screen using transparencies. Everything on the transparency had to be first printed backwards so that it would show on the screen in the right order.
What type of lens must a slide projector have in order to get an upright image?
Most slide projectors use mounts that are 50mm x 50mm square with an image that is 24mm x 36mm. The image can either be in landscape view, wider that it is high or in portrait view, higher than it is wide. The shape of the image on a screen is dependant entirely on the way the slide is inserted into the slide magazine or into the gate of the projector. Lenses are no different for the two views.
What is necessary in order to use PowerPoint's presentation view?
A PC (computer), a PC projector and a screen.
What is a vacuum tube in which a stream of electronics is focused on a phosphorescent screen in order to produce a image?
A stream of electrons is accelerated by several thousand volts, & focused on to a phosphorescent screen in a CRT (cathode ray tube) commonly known as a picture tube.
What is the term used to correctly determine the appropriate screen size for a front projector?
The size of your screen depends on the focal length of the lens of your projector, the projection distance (or "throw") from projector to screen, and the aspect ratio of your widest projection. The "aspect ratio" is the ratio of image width to image height of your projector. It will vary depending on if you have an HD, television, or computer projector. It will also vary according to the media you feed to it, and many models will automatically adjust for HD, widescreen, or broadcast. Most video projectors come with a zoom lens to alter the lens focal length. This will allow you to adjust the size of your projection to fit the dimensions of the screen. If the throw is not a limiting factor, the best route is to start with a screen size. If (like most people) you plan on playing 16:9 (HD aspect) and 4:3 (non-HD aspect) content, figure the size using the 16:9. So the pick your projection area: For every 16 inches wide, you will need at least 9 inches high. The throw on most home projectors is roughly 2 feet (projector to screen) for every 1 foot (screen width). So for a honking big 6 foot wide screen, the projector needs to be 10.5 to 14 feet away. So in order to sound like you know what your doing, tell the salesperson you need a screen that is [blah] inches wide with a 16:9 aspect ratio for HD (or 4:3 aspect ratio for computer/non-HD television). Another snazzy way to go is to buy a can of projection paint and slap it on the wall. It looks nicer when the projector is off and is a little cheaper, but the obvious disadvantage is the lack of mobility in your setup as well as washing the wall if the sticky goo of a Paulie Shore movie gets played.
What is an aplanat?
An aplanat is a lens which has been corrected for spherical aberration in order to produce a rectilinear image - an image with straight lines.
What three colors are processed by digital camera in order to produce an image?
Red, green and blue.
Why an image formed by a plane mirror cannot be projected onto a screen?
An image formed by a plane mirror cannot be projected onto a screen because the image is virtual and appears to be behind the mirror. This means that light rays do not actually converge at the location of the image, making it impossible to project onto a screen.
How do i post a comment in the image line forum?
You need to register with Image Line in order to post in the forum. Click the Join link on the top right hand corner of the screen.
Does it hurt your computer if you don't use a screensaver?
it does not hurt the computer, but maybe the monitor. The screen saver is used to prevent the current image on the screen from being burned into the screen. Though it was a more crucial feature on rear-projection (thick) monitors, it is a good idea to use one on LCD and LED monitors in order to prevent the image from being burned into the screen.
Why are the slides inserted upside-down into the slide projector to see them right side up?
As light travels through a convex lens (used in most slide projectors), the light and slide image are turned upside-down. Therefore, in order to appear correctly on screen, the image must enter the lens upside-down, which would then be inverted by the lens to appear right-side up. **** Furthermore, they are reversed left to right. What applies to the vertical holds true for the horizontal. The above holds true for any type of slide projector that performs similar to a Kodak carousel. However, the cube projector (Bell & Howell?) was different because the image bounced off of a mirror before going through the lens. I believe those slides were inserted into the cube right side up, but backwards (left to right), but I'm not sure.
