Matt Carey, the co-founder and CEO of Boston-based startup Teradar, loves when people tell him: “I don’t believe you.”

That’s “right where we want folks,” he recently told TechCrunch.

Carey has spent the last few years quietly building a solid-state sensor that sees the world using the terahertz band of the electromagnetic spectrum, which sits between microwaves and infrared. It essentially combines the best traits of radar sensors — like no moving parts and the ability to pierce rain or fog — with the higher definition afforded by laser-based lidar sensors.

It’s a product that’s never been done at this scale before, so people are understandably skeptical when Carey explains his work. A long-range, high-resolution sensor that’s also affordable?

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