The correct answer is letter D. candela. The unit for measuring the rate at which light energy is radiated from a source is the candela. L<span>umen is the unit for measuring the total amount of visible light emitted by a source. Lux is lumen per square meter. </span>
Answer:
Geometrical optics, or ray optics, describes the propagation of light in terms of "rays" which travel in straight lines, and whose paths are governed by the laws of reflection and refraction at interfaces between different media.
Answer:
Distancia = 27559.06 pies
Explanation:
Dados los siguientes datos;
Velocidad = 20 km/hr
Tiempo = 25 minutos
Conversión de minutos a horas;
60 minutos = 1 hora
25 minutos = 0.42 horas
Para encontrar la distancia;
Distancia = velocidad * tiempo
Distancia = 20 * 0.42
Distancia = 8.4 km
Conversión de kilómetros a pies;
1 km = 3280.84 pies
8.4 kilometros = 8.4 * 3280,84 = 27559,06
Distancia = 27559.06 pies