Using an intensity of 1 × 10 - 12 W m2 as a reference the threshold of hearing for an average young person is 0 dB Person 1 and person 2 who are not average have thresholds of hearing that are β1 5 dB and β2 9 dB What is the ratio I1 I2 of the sound intensity I1 when person 1 hears the sound at his own threshold of hearing compared to the sound intensity I2 when person 2 hears the sound at his own threshold of hearing?

magnified images possible images can be real = projected onto a screen

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

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h o h o hope you have a merry christmas!