This wireless technology is sometimes referred to as line-of-sight communication because the light waves can only travel in a straight line.

The wireless technology that is sometimes referred to as line-of-sight communication because the light waves can only travel in a straight line is Infrared (IR) technology.

Here are the steps to answer this question:

1. Understand the question: The question is asking about a wireless technology that uses light waves which can only travel in a straight line, also known as line-of-sight communication.

2. Identify the technology: The technology that fits this description is Infrared (IR) technology.

3. Explain the technology: Infrared technology is a type of wireless communication that uses infrared light waves to transmit data. Because light travels in a straight line, the devices using infrared technology must be aligned or they must be within the line of sight of each other. This is why it is sometimes referred to as line-of-sight communication.

4. Conclusion: Therefore, the wireless technology that is sometimes referred to as line-of-sight communication because the light waves can only travel in a straight line is Infrared (IR) technology.