In the microwave oven, we use electromagnetic oscillators which produce electromagnetic waves in the wavelength range.

$1 m m t o 10 m$
$0.7 μ m t o 1 m m$
$1 m t o 1 m m$
$0.1 μ m t o 0.7 μ m$

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Solution

The correct option is C
$1 m t o 1 m m$

Explanation for correct option:
Microwaves:
Microwave is a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter corresponding to frequencies between 300 MHz and 300 GHz respectively.
Their frequencies (and wavelengths) fall between $300 M H z a n d 300 G H z (o r λ = 1 m t o λ = 1 m m)$ .
Microwave ovens at home or in restaurants run at frequencies of roughly $2.45 G H z, o r λ = 12.23 c m$ , in accordance with international norms.
Hence, the correct answer is option (C).

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