A light source radiates 60.0 W of single-wavelength sinusoidal light uniformly in all directions. What is the average intensity of the light

Question

A light source radiates 60.0 W of single-wavelength sinusoidal light uniformly in all directions. What is the average intensity of the light from this bulb at a distance of 0.400 m from the bulb

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Minh Khuê 5 years 2021-07-14T14:41:39+00:00 2 Answers 22 views 0

Answers ( )

  1. Delwyn
    0
    2021-07-14T14:42:59+00:00
    Reply

    Answer: 29.85\ W/m^2

    Explanation:

    Given

    Power P=60\ W

    Distance from the light source r=0.4\ m

    Intensity is given by

    I=\dfrac{P}{4\pi r^2}

    Inserting values

    \Rightarrow I=\dfrac{60}{4\pi (0.4)^2}\\\\\Rightarrow I=\dfrac{60}{2.010}\\\\\Rightarrow I=29.85\ W/m^2

  2. thienthanh
    0
    2021-07-14T14:43:38+00:00
    Reply

    Answer:

    29.85 W/ m^2

    Explanation:

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