Pulsars emit radiation at different radio frequencies. Suppose that you measure the rotational period of the same pulsar using two different radio frequencies, 400 MHz and 800 MHz. Select the correct answer. there is not enough information the period measured at 400 MHz is shorter than the period measured at 800 MHz the period measured at 400 MHz is longer than the period measured at 800 MHz the periods measured at 400 MHz and 800 MHz are the same