about 1.2 to 1.6 million pixels
It depends on the resolution of the device. For a standard 96 pixels per inch resolution, 250 pixels would be approximately 2.6 inches.
480
The number of pixels in a TV depends on its resolution. For example, a Full HD TV has a resolution of 1920 x 1080 pixels, totaling about 2.1 million pixels. A 4K Ultra HD TV has a resolution of 3840 x 2160 pixels, which amounts to approximately 8.3 million pixels. Higher resolutions, like 8K, have even more pixels, with 7680 x 4320 pixels, resulting in about 33.2 million pixels.
MEGA=ONE MILLION PIXEL=PIcture ELement If you look closely at or examine with a magnifying glass a computer monitor screen you will see that it is made up of lots and lots of tiny dots. Each dot is an element of the picture or picture element - pixel. Each pixel is controlled by a signal from the computer so it can be turned off or on or made to show a colour. In this way a picture can be built up. The more pixels, the more detail in a photo. Low numbers of pixels in a photo will make a blurry looking photo, whilst many more pixels will give a photo which looks sharp, with lots of small detail able to be seen. Cameras are graded on the number of pixels that they can reproduce in a photo. The more pixels, the better the camera [usually!]. A camera with 10 megapixel resolution should take far better photos than a camera with only 6 megapixel resolution.
The number of pixels in a 4x6 picture depends on the resolution (DPI - dots per inch) used. For example, at a resolution of 300 DPI, a 4x6 picture would be 1200x1800 pixels, resulting in a total of 2.16 million pixels. At 72 DPI, it would be 288x432 pixels, totaling about 124,416 pixels.
The iPad 1 and iPad 2 both had a resolution of 1024x768, for a total of 786432 pixels.
I'm sorry, but you don't. Once a photo is taken, that's how many pixels it has. Most cameras don't allow you to change the pixel size of what they take either.
This depends on the DPI/PPI (dots/pixels per inch).Web image-resolution is 72 DPI.Print resolution can be anywhere between 150-300 DPI.
It depends on the resolution. For example a resolution of 1220x960 would have 1,171,200 pixels or 1.1 megapixel. You take the height (1220) times the length (960.) If referring to an image, you can say it is a 1220 by 960 or a 1.1 megapixel image.
A high resolution photo can range from 2 to 5 megabytes, which is equivalent to 2000 to 5000 kilobytes.
Pixels are a measurement of the resolution of an image. For example, old laser printers used to print in 300x300 pixels per inch, then came 600x600 prints. I'm sure you're asking "Why are you talking about laser printers when I asked about pictures?" Because the premise is the same. An image that is 1 inch by 1 inch that use the 600x600 resolution would have a file size roughly twice that of a 300x300 resolution. All of that to tell you that no one can really tell you, you will have to find the resolution of the image, find out how many pixels are in a square inch of that resolution, then multiple it by the size image you have.
Resolution can have many meanings.A resolution can be a plan, a statement of intent: I will give up smoking on New Year's Day is an example for a resolution.A resolution can be an agreed solution, the result of negotiations: The resolution of this conflict involves the purchase of....A resolution can be a measure for maximum precision: my bathroom scale has a resolution of 1kg.Resolution is used to describe the number of pixels on a computer screen, usually quoted as width × height, with the units in pixels: for example, "1024x768" means the width is 1024 pixels and the height is 768 pixels.Many other meanings of resolution will exist in specialist areas such as Finance or Law.