A measuring method and apparatus in which a measurable object (23) is irradiated with acoustically induced electromagnetic waves to measure a magnetic property from one or more characteristics selected from the group which consists of intensity, phase, and frequency characteristics of said electromagnetic waves. The magnetic property of said measurable object (23) includes a property value for magnetization due to nuclear spin in said measurable object (23) or for acousto-magnetic resonance attributable to electron spin or nuclear spin in said measurable object (23).
