Question

Light from a red laser pointer has a speed of 3.0×10^8 m/s and has a wavelength of 6.5×10^−7 m . What is the frequency of this light?
A.
2.0×10^2 m^2/s
B.
4.6×10^14 1/s
C.
4.6 s
D.
2.2×10^−15 s

Answer 1

Answer:

B.

4.6×10^14 1/s

Explanation:

v = f × lambda

Where,

v is the velocity

f is the frequency

Lambda is the wavelength

3.0 × 10⁸ = f × 6.5 × 10^-7

f = (3 × 10⁸) ÷ (6.5 × 10^-7)

f = (3/6.5) × 10^(8 - -7)

f = 0.4615384615 × 10¹⁵

f = 4.615384615 × 10¹⁴

Answer 2

Answer:

the answer is b

Explanation:

because you multiply speed times wavelength