Question

Which observation was one of the major difficulties for classical wave theory?

विकल्प

• Photoelectric emission is essentially instantaneous

• A voltmeter measures the potential difference

• A commutator changes polarity between plates

• A microammeter measures photocurrent

Answer 1

Essentially instantaneous photoelectric emission was a major difficulty for classical wave theory. Emission begins without an appreciable time lag when suitable radiation reaches the metal surface.