That is called a strait.
An inlet
the strip of water that connects two (large) waterways is called a strait.
A smaller opening.
Segmentation
Diffraction is more pronounced through a small opening because the smaller the opening, the higher the amount of bending or spreading of light waves as they pass through. This phenomenon is more noticeable when the opening size is close to the wavelength of the light being diffracted.
When a wave enters a small opening, it diffracts, spreading out to fill the space behind the opening. The wave bends around the edges of the opening, causing interference patterns to form. The smaller the opening, the greater the diffraction effect will be.
You would have to try to bend the opening of a straw to make it smaller. Then, fix it into the opening of the other straw. It will only fit to a certain depth.
To determine the sex of a cat, you can look at the distance between the anus and the genital opening. In male cats, this distance is greater than in females. Additionally, male cats have a more pronounced genital opening, called the scrotum, which contains the testicles. Female cats have a smaller, less prominent genital opening. It is best to consult a veterinarian for accurate identification.
there are exactly 1.6 billion mountains in the whole wide world
A smaller opening will cause more diffraction, with diffraction being more pronounced when the size of the opening is comparable to the wavelength of the wave passing through it. For example, a single slit with a width similar to the wavelength of light will produce more diffraction compared to a wider slit.
The principle involved is known as Bernoulli's principle. This states that as the velocity of a fluid increases, its pressure decreases. Therefore, when fluid flows through a smaller opening, its velocity increases, resulting in a decrease in pressure.
The upper set, the rotor, provides lift. The smaller blade at the rear provides steering .