Find the average power per unit area at distance of 2 m from a small bulb, if the bulb emits 20 W of electromagnetic radiation uniformly in all directions.

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation at a distance of lm from the bulb? Assume that the radiation is emitted isotropically and neglect reflection.

About 5% of the power of a 100 W light bulb is converted to visible radiation . What is the average intensity of visible radiation at a distance of 1 m from the bulb ? Assume that the radiation is emitted isotropically and neglect reflection .

A 60 W bulb is placed at a distance of 4 m from you. The bulb is emtting light of wavelength 600 nm uniformly in all directions. In 0.1 s, how many photons enter your eye if the pupil of the eye is having a diameter of 2mm? [take hc=1240eV-nm]

A 60 W bulb is placed at a distance of 4 m from you. The bulb is emtting light of wavelength 600 nm uniformly in all directions. In 0.1 s, how many photons enter your eye if the pupil of the eye is having a diameter of 2mm? [take hc=1240eV-nm]

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation a. at a distance of 1m from the bulb b. at a distance of 10m Assume that the radiation is emitted isotropically and neglect reflection.

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation (a) at a distance of 1m from the bulb? (b) at a distance of 10 m? Assume that the radiation is emitted isotropically and neglect reflection.

About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation (a) at a distance of 1 m from the bulb? (b) at a distance of 10 m ? Assume that the radiation is esmitted isotropically and neglect reflection.