No, it is not possible to increase the speed of electromagnetic waves by simultaneously increasing their frequency and wavelength. The speed of electromagnetic waves in a vacuum is a fundamental constant known as the speed of light, denoted by 'c'. In a vacuum, all electromagnetic waves, regardless of their frequency or wavelength, travel at the same speed of approximately 299,792,458 meters per second (or about 186,282 miles per second).
The speed of light in a vacuum is determined by the fundamental properties of space and time, as described by the theory of special relativity. According to this theory, the speed of light is an absolute limit and cannot be exceeded by any physical object or information.
While the frequency and wavelength of electromagnetic waves are related through the equation c = λν, where 'c' is the speed of light, λ (lambda) is the wavelength, and ν (nu) is the frequency, changing the frequency or wavelength does not affect the speed at which the waves propagate. If the frequency increases, the wavelength decreases, and vice versa, but the speed remains constant.
In different media, such as air, water, or glass, the speed of light can be reduced compared to its speed in a vacuum due to interactions with atoms or molecules in the medium. This reduction leads to phenomena like refraction. However, the speed of light in a given medium is still determined by the properties of that medium and not by the frequency or wavelength of the electromagnetic waves themselves.