Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to build near infrared goggles [title] Understand these goggles. [step] Human vision is most sensitive to light with wavelengths up to about 720 nanometers (red light). But if you filter out this " visible " light using these goggles, human eyes can pick up signals in the near infrared part of the spectrum, up to about 1 , 000 nm.

Ending1: [title] Expose your goggles to a uv light source. [step] Trace the uv light source by carefully tracing along the lid of the goggles. Ending2: Since our eyes can barely detect near infrared light, the goggles will only work in bright sunlight, or around another strong source of infrared light. They are not night vision goggles, but they will give you a weird new perspective on the world. Ending3: When you filter the uv light out, you empower infrared eyes to see better. We have discovered an escape ladder, which you stand atop in this configuration of goggles. Ending4: The exposure of the goggles without a uv filter often paralyzes the lenses in darkness, which diminishes lenses visibility by 25 %. The goggles give studies further insight into their ability to best provide vision for humans.

Answer format: ending1/ending2/ending3/ending4