Question

If intensity remains the same while the power is doubled, what has happened to the beam area?

A. Quadrupled.
B. Doubled.
C. Halved.
D. Unchanged.

Answer 1

When the power is doubled while the intensity remains the same, the beam area remains unchanged.

Step-by-step explanation:

When the power is doubled while the intensity remains the same, we can use the formula:

1. Intensity = Power/Area

Since the intensity remains the same, we can rewrite the formula as:

1. Power/Area = Power(2)/Area(2)

Cross-multiplying, we get:

1. Power * Area(2) = Power(2) * Area

Dividing both sides of the equation by Power gives us:

1. Area(2) = Area

Therefore, the beam area remains unchanged.