frequency's unit is Hz which mean cycles per second
given frequency * wavelength = speed of wave
speed of light = 3x10^8 m/s
wavelength = 680nm = 680x10^-9 m
frequency * 680x10^-9 m = 3x10^8 m/s
frequency = 3x10^8 / 680x10^-9
= 4.41x10^14 Hz
= 441x10^12 Hz
= 441 THz
which is the frequency for red light
Answer:
79 1/6 m
Explanation:
Perimeter of a rectangle = 2(length + width)
Length = 73/3 ; width = 61/4
Therefore.
Perimeter = 2(73/3 + 61/4)
Perimeter = 2(292 + 183) / 12
Perimeter = 2(475/12)
Perimeter = 950/12
Perimeter = 79 2/12
Perimeter = 79 1/6 m
