Cov peev txheej

Hais txog UV Teeb

Post lub sij hawm: 09-18-2020

1. Ua ntej tshaj plaws, koj puas nkag siab tias UV teeb yog dab tsi? Nws ua li cas? UV yog cov lus luv luv rau Ultraviolet Rays, lossis ultraviolet lub teeb, nrog lub wavelength ntawm 100 txog 400 nm, uas yog electromagnetic nthwv dej ntawm X-rays thiab pom lub teeb. Qhov no txhais tau tias lub teeb no yog ...

Nyeem ntxiv >>