A Blue Line in the Spectrum of the Hydrogen Atom $\lambda$

question 81

Multiple Choice

A blue line in the spectrum of the hydrogen atom has a wavelength $\lambda$ = 486 nm.In the hydrogen-atom spectrum emitted by a distant galaxy,this line is observed on Earth at $\lambda$ = 550 nm.With what speed is this galaxy receding from us? (The speed of light is 3.0 $\times$ 10⁸ m/s.)

• A)1.31 \(\times\) 10⁷ m/s
• B)1.13 \(\times\) 10⁸ m/s
• C)2.65 \(\times\) 10⁸ m/s
• D)3.49 \(\times\) 10⁷ m/s
• E)3.95 \(\times\) 10⁷ m/s

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Definitions:

Transvaginal Ultrasonography

A type of medical imaging that uses sound waves to create images of the internal structures of the female pelvis, including the uterus and ovaries, through the vagina.

Postmenopausal

Pertaining to the period in a woman's life after the cessation of her menstrual cycles.

Vaginal Bleeding

Bleeding that originates from the vagina and can be a symptom of various conditions, ranging from normal menstrual cycles to serious health issues.

STIs

Sexually Transmitted Infections, diseases passed from one person to another through sexual contact.