Word Pairs


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The words
Smartphones are a [wander / wonder] of modern technology. They have many features that we [rely / relay] on every day. They also have many hidden functions that we are unaware [on / of] . One such secret is on the new Apple iPhone 14 Pro. This has the [able / ability] to measure someone's height. You just point your phone camera at a person, click [on / at] the Measure app, and get an instant measurement of [how / what] tall that person is. The person whose [high / height] you are measuring must be standing in front of the camera from head to [finger / toe] . It is possible to measure your own height in a mirror, but this is not [so / such] accurate. It would be better for a friend to do it for you. The new Measure app could end arguments about who is the [tallest / tall] .

The Measure app uses AR (augmented reality) and a special sensor [what / that] is inside the camera. The technology behind the sensor is [calling / called] LiDAR. This is an [anchor / acronym] for "light imaging, detection, and ranging". LiDAR is also called 3D laser [skimming / scanning] . It is used to make digital 3D models of areas of the Earth's surface and of the [under / bottom] of the ocean. LiDAR measures a person's height by sending [in / out] pulses of light. These light pulses [pounce / bounce] off the person being measured and return to the LiDAR sensor. The app measures how [long / length] this took. The length of time helps the app to [calculate / calculation] the person's height. The website bgr.com joked that the app, "isn't as [cool / cold] as drawing lines on a door" to find someone's height.

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