abobla@lemm.ee to Privacy@lemmy.mlEnglish · 10 months ago"Wiffract" Wi-Fi method can read letters through wallswww.techspot.comexternal-linkmessage-square32fedilinkarrow-up1236arrow-down16
arrow-up1230arrow-down1external-link"Wiffract" Wi-Fi method can read letters through wallswww.techspot.comabobla@lemm.ee to Privacy@lemmy.mlEnglish · 10 months agomessage-square32fedilink
minus-squarecrapwittyname@lemm.eelinkfedilinkarrow-up6·edit-210 months agoI think your fag packet calculation has got a power of ten wrong somewhere. Wi-fi is GHz so that would be on the order of centimetres I think.
minus-squareTurun@feddit.delinkfedilinkarrow-up4·10 months agoYes. Wifi is 2.4 GHz, speed of light is 0.3 Gm/s. Therefore one wavelength is 0.3/2.4 m/s/Hz = 12.5 cm
minus-squareHamartiogonic@sopuli.xyzlinkfedilinkarrow-up1·10 months agoYeah, you’re right. Writing it smaller than 12.5 cm should do it, which is entirely reasonable.
I think your fag packet calculation has got a power of ten wrong somewhere. Wi-fi is GHz so that would be on the order of centimetres I think.
Yes. Wifi is 2.4 GHz, speed of light is 0.3 Gm/s. Therefore one wavelength is 0.3/2.4 m/s/Hz = 12.5 cm
Or 0.001 football pitches
Yeah, you’re right. Writing it smaller than 12.5 cm should do it, which is entirely reasonable.