Question

The width of a particular microwave oven is exactly right to support a standing-wave mode. Measurements of the temperature across the oven show that there are cold spots at each edge of the oven and at three spots in between. The wavelength of the microwaves is 12 cm. a. How wide is the oven?
b. What is the frequency of the microwaves?

Answer 1

Answer:

a) l = 24 cm

b) υ = 2.5 × 10⁹ Hz

Explanation:

given,                      

wavelength of microwave = 12 cm

length of microwave        

           = 2 × λ                    

           = 2 × 12                    

        l = 24 cm

microwave is an electromagnetic wave speed is 3 × 10⁸ m/s

v = υ λ                

υ = $\dfrac{v}{\lambda}$            

υ = $\dfrac{3 \times 10^8}{0.12}$

υ = 2.5 × 10⁹ Hz