A. Write the velocity of an electromagnetic wave in vacuo in m/s in standard form.
B. Write down two examples of electromagnetic waves.
C. Calculate the frequency, f, in Hertz for the following electromagnetic waves - express your answer in standard form, using 4 significant figures.
|
1) l = 3 m |
2) l = 7 mm |
3) l = 1 m m |
|
4) l = 300 nm* |
5) l = 5 nm* |
6) l = 17 m |
*n.b. 1 nm = 10-9 m = 1 nanometre
D. Find the wavelengths of these colours of light, expressing your answer in metres in standard form and in nanometres using 4 significant figures.
|
Colour |
Approximate Frequency / Hz |
|
Violet |
7.06 x 1014 |
|
Indigo |
6.67 x 1014 |
|
Blue |
6.32 x 1014 |
|
Green |
5.71 x 1014 |
|
Yellow |
5.22 x 1014 |
|
Orange |
4.80 x 1014 |
|
Red |
4.29 x 1014 |