infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:
let's start from the lower value, we have:
(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)
the higher value is:
so, the range of wavelength of infrared radiation is:
-2x + 7 = 7
subtract 7 from both sides.
-2x = 0
divide both sides by -2.
x = 0the value of x is equal to 0.
you subtract 8 out of 3 which turns into a negavtive.
3 minus 8 equals -5
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