Axis Communication Certification Practice Exam 2025 – Complete Test Prep

Question: 1 / 400

If a light source provides 2 Lux at 20 feet, how much Lux is expected at 10 feet?

4 Lux

8 Lux

To understand how the Lux level changes with distance from a light source, it's important to apply the concept of the inverse square law. The law states that the illuminance (Lux) from a point light source is inversely proportional to the square of the distance from the source. This means that if you reduce the distance from the light source, the amount of Lux will increase significantly.

In this case, if the light source provides 2 Lux at 20 feet, the distance is halved when considering 10 feet. The formula to calculate the change in illuminance based on distance is:

\( Lux_1 \times \left( \frac{D_1}{D_2} \right)^2 \)

Here, \( Lux_1 \) is the initial illuminance (2 Lux at 20 feet), \( D_1 \) is the initial distance (20 feet), and \( D_2 \) is the new distance (10 feet).

Applying the formula:

1. Initially, at 20 feet:

- Lux = 2

2. At 10 feet, using the distances:

- \( Lux = 2 \times \left( \frac{20}{10} \right)^2 =

Get further explanation with Examzify DeepDiveBeta

6 Lux

2 Lux

Next Question

Report this question

Download Axis Communication Certification Practice Exam 2025 – Complete Test Prep PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy