Question

The wavelength of violet light in a spectrum is about 0.0000004 meters. which number best approximates this length as a power of 10
A. 4 x 10^-7
B. 4 x 10^-6
C. -4 x 10^7
D. 4 x 10^7

Answer 1

Answer:

Option A is correct.

Step-by-step explanation:

The wavelength of violet light in a spectrum is about 0.0000004 meters.

Now, we have to express this wavelength best approximate as a power of 10.

Now, 0.0000004 can be written as $\frac{4}{10000000}$

Therefore, 0.0000004 meters = $\frac{4}{10^{7} }$ meters

So, 0.0000004 meters = $4 \times 10^{-7}$ meters

Hence, option A gives the correct answer. ( Answer )

Answer 2

Answer:

A.

Step-by-step explanation:

Hope this helps.