64 grams of ozone I think
The answer is 5 meters.
The illuminance on a surface (E) is equal to the light intensity (I) divided by the square distance from the light source (d):
E = I ÷ d² [=] candela/ square meters = lux.
The unit of the illuminance is lux.
So, it is given:
E = 4 lux
I = 100 candelas
d = ?
If:
<span>E = I ÷ d²
</span>Then
d² = <span>I ÷ E
</span>⇒ d² = 100 ÷ 4
⇒ <span>d² = 25
</span>
If we put both sides of the equation under the square root, then:
√<span>d² = </span>√<span>25
</span>⇒ d = 5 meters.
Therefore, the surface is 5 meters far from the light source.
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A spectrum is a pattern is unique to a substance and can be used identify it.
According to Max Plank, energy occurs in packets called quanta. Hence, energy is not continuous but takes on discrete values which are integer multiples of a fundamental amount.
Again, when a substance is given light energy, a characteristic fingerprint is obtained. This pattern is unique to the substance that has it. These characteristics “fingerprints” are called spectrums.
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