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# AS Physics calculation Question watch

1. I have a problem with how to input numbers into the calculator, in order to get the correct answer. For example.

A question, Im having trouble with- 1. Calculate the frequency of light of wavelength 590nm.

I know wavelength ('W') = C (speed of light) / F (frequency)

To get Frequency, you obviously need to re-arrange the formula first, so you get, frequency= C/W.

So in the calculator, I input, 3.0 x 10^8 / 5.90* 10^-9 (converting nano metres into metres). When I do this, the calculator, comes out with the completely wrong answer, compared to what the text book says. This is obviously, very frustrating :L.

Anyway, can anyone see and error in how im inputing the figures into the calculator. (scientific casio calculator fx-83ES). How should I input the figures in order to get the right answer. Assuming, I havent made a mistake in the re-arrangement of the formula.
2. bump
3. (Original post by jarasta)
I have a problem with how to input numbers into the calculator, in order to get the correct answer. For example.

A question, Im having trouble with- 1. Calculate the frequency of light of wavelength 590nm.

I know wavelength ('W') = C (speed of light) / F (frequency)

To get Frequency, you obviously need to re-arrange the formula first, so you get, frequency= C/W.

So in the calculator, I input, 3.0 x 10^8 / 5.90* 10^-9 (converting nano metres into metres). When I do this, the calculator, comes out with the completely wrong answer, compared to what the text book says. This is obviously, very frustrating :L.

Anyway, can anyone see and error in how im inputing the figures into the calculator. (scientific casio calculator fx-83ES). How should I input the figures in order to get the right answer. Assuming, I havent made a mistake in the re-arrangement of the formula.
Tried using brackets when doing one divided by the other.

3*10^8/5.9*10^-9 is very different to (3*10^8)/(5.9*10^-9)
4. Under Abs button on the calculator you should see two squares seperated by a line. Use this for dividing, it's easier to spot a mistake and simpler to use IMO.

3x10^8m/s is correct, but wavelength should be 5.9x10^-7m.
5. (Original post by A123W)
Under Abs button on the calculator you should see two squares seperated by a line. Use this for dividing, it's easier to spot a mistake and simpler to use IMO.

3x10^8m/s is correct, but wavelength should be 5.9x10^-7m.
aaaahh that makes sense. thanks

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Updated: September 25, 2011
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