Answer:
See below.
Step-by-step explanation:
An incandescent lamp produces all colours of the visible spectrum, with wavelengths ranging from approximately 400 nm (violet) to 700 nm (red).
Since <em>energy is inversely proportional to wavelength</em>,
E ∝ 1/λ
a quantum of 400 nm violet light has more energy than one of 700 nm red light.
An incandescent lamp produces a relatively small amount of the high-energy blue/violet light ( see image below).
The table below gives the colours in the visible spectrum, ranked from highest to lowest energy.
<u>Colour λ/nm </u>
Violet 400 – 450
Blue 450 – 490
Cyan 490 – 520
Green 520 – 560
Yellow 560 – 590
Orange 590 – 635
Red 635 – 700
Answer. Chemical reaction had occurred and both the powders are different substances.
Explanation:
As density is an intensive property of the substance.Which means that different substance have different densities.
Density =
Density of powder 1,
Density of powder 2,
On comparing both the densities of the powders we can say that both the substances are different. So we can conclude that the chemical reaction had occurred.