Blue light has a wavelength of 4.75×10-7meters. What is this in standard form?

Blue light has a wavelength of 4.75×10-7meters. What is this in standard form?

A) 0.000000475 m

B) 0.00000475 m

C) 0.0000475 m

D) 0.000475 m​

Answer: B) 0.00000475 m

To represent a number in the standard form, we should move the decimal place such that there is only a single non-zero digit that precedes the decimal point, and then the exponent will be adjusted by its value.

Given: Wave length of the blue light = 4.75 * 10^-7 m.

To convert this to standard form, we move the decimal point 7 places to the right:

4.7.5 x 10^-4 = 0.00000000475

Consequently, the wavelength of blue light being denoted in the standard style is 4.75×10-6 m giving rise to option B.

In standard form, the number is given the usual numeric form, which may equal a single non-zero digit to the left of the decimal point and the decimal point and the remaining numerals after it. The next log represents the number of places that the decimal point has been moved from the original position.