If a screen is 90 inches wide and the lens ratio is 2.0:1, what is the distance required from the projector to the screen?

If a screen is 90 inches wide and the lens ratio is 2.0:1, what is the distance required from the projector to the screen?

• A. 180
• B. 90
• C. 120
• D. 150

Answer: (A)

To determine the distance required from the projector to the screen given a screen width of 90 inches and a lens ratio of 2.0:1, it’s essential to understand the concept of lens ratio. The lens ratio indicates how many units of distance are needed for every unit of screen width. In this case, a lens ratio of 2.0:1 means for every 1 inch of screen width, the projector must be 2 inches away. Thus, for a screen that is 90 inches wide, the calculation for the distance from the projector to the screen can be carried out as follows: Distance = Screen Width × Lens Ratio Distance = 90 inches × 2.0 Distance = 180 inches This means the projector needs to be positioned 180 inches away from the screen in order to project an image that properly fits the 90-inch wide screen.

To determine the distance required from the projector to the screen given a screen width of 90 inches and a lens ratio of 2.0:1, it’s essential to understand the concept of lens ratio. The lens ratio indicates how many units of distance are needed for every unit of screen width. In this case, a lens ratio of 2.0:1 means for every 1 inch of screen width, the projector must be 2 inches away.

Thus, for a screen that is 90 inches wide, the calculation for the distance from the projector to the screen can be carried out as follows:

Distance = Screen Width × Lens Ratio

Distance = 90 inches × 2.0

Distance = 180 inches

This means the projector needs to be positioned 180 inches away from the screen in order to project an image that properly fits the 90-inch wide screen.