An appropriate light emission frequency is set in an electronic device that determines a phase difference between radiation light and reflected light. The electronic device includes a light emission unit, a determination unit, and a setting unit. The light emission unit radiates intermittent light in synchronization with a synchronization signal at a set frequency that is set. The light reception unit generates received light data by receiving reflected light of the intermittent light. The determination unit determines presence or absence of a predetermined object on the basis of the received light data. The setting unit sets, in the light emission unit, as the set frequency, a frequency that is higher, the smaller the distance to the predetermined object, in a case where presence of the predetermined object is determined.