Answer:
34 cm and 12 cm
Explanation:
Wavelength: This can be defined as the distance in meter required to complete one circle.
The formula for the wavelength of a wave is given as,
λ = v/f..................... Equation 1
Where λ = wavelength, v = velocity of a microwave, f = frequency.
For The first micro wave,
λ = v/f
Given: f = 890 MHz = 890000000 Hz = 8.9×10⁸ Hz
Constant: Note: All electromagnetic wave moves with same speed v = 3×10⁸ m/s.
Substitute into equation 1
λ = 3×10⁸/8.9×10⁸
λ = 0.34 m.
λ = 34 cm
For the second micro wave,
λ = v/f..................... Equation 1
given: f = 2500×10⁶ Hz = 2.5×10⁹ Hz, v = 3×10⁸ m/s.
Also substitute into equation 1
λ = 3×10⁸ /(2.5×10⁹)
λ = 1.2×10⁻¹ m
λ = 12 cm.
