[填空题]
A satellite dish is abouto6mq00 b k h10yi4ouo 4wxl0ly ;aqof( 0.5 m in diameter. According to the user’s /t v;mhfv: 6fta , jr n0xw4.jkei/in8manual, the dish has to be pointed in the direction of the jt,4/kn6w:nfifra 8em vv./xhi; 0tjsatellite, but an error of about 2 $^{\circ} $ is allowed without loss of reception. Estimate the wavelength of the electromagnetic waves received by the dish. m