[填空题]
A satellite dish is euv*.0z4nstd*ms 2yo mmd(g 2about: fiqixs.z83b 0.5 m in diameter. According to the user’s manual, the dish has to be pointed in the direction of the satellite, but an error of bxf i.s:qiz38about 2 $^{\circ} $ is allowed without loss of reception. Estimate the wavelength of the electromagnetic waves received by the dish. m