Blue Christmas (Nemeth Code) – Braille Refreshers 2025120101

Question Title

* The wavelength of blue light is between 450 and 495 nanometers. A nanometer represents one billionth of a meter (10⁻⁹ m).

Which option below shows "'10 superscript negative-9' m" correctly in Nemeth Code?

We hope you do NOT have a blue Christmas like Elvis sang about! 😉💙😄

10⁻⁹ m

⠸⠩⠀⠼⠂⠴⠔⠤⠔⠀⠸⠱⠀⠰⠍

⠸⠩⠀⠼⠂⠴⠘⠤⠔⠀⠸⠱⠀⠰⠍

⠸⠩⠀⠼⠂⠴⠘⠤⠔⠀⠰⠍⠀⠸⠱

⠸⠩⠀⠼⠂⠴⠔⠤⠔⠀⠰⠍⠀⠸⠱

Question Title

* APH is happy to provide Braille Refresher questions.