The H D Line Has a Wavelength of 410

question 43

Multiple Choice

The H d line has a wavelength of 410.2 nm when observed in the laboratory. If the H d line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

• A) 146 km/sec away from the observer.
• B) 146 km/sec toward the observer.
• C) 6.0*10⁷m/sec away from the observer.
• D) 6.0*10⁷m/sec toward the observer.
• E) The radial velocity of the star cannot be determined from this information.

---

Definitions:

Noninvasive Electrical Stimulation

A treatment method using electrical currents applied through the skin to stimulate nerves and muscles.

Kegel Exercises

Pelvic floor exercises that involve repeatedly contracting and relaxing the muscles that form part of the pelvic floor, often recommended for improving pelvic health.

Pelvic Nerves

The network of nerves in the pelvic region responsible for controlling the lower abdominal organs.

Painful Bladder Syndrome

A chronic condition characterized by bladder pressure, bladder pain, and sometimes pelvic pain, with varying severity and duration.