A red LED emits light at 0.1 watt uniformly around it

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is : (1) 5.48 V/m (2) 7.75 V/m (3) 1.73 V/m (4) 2.45 V/m

Related theory

Browse the problem library