If the Wavelength of the Background Radiation Peaked at 1 $\mu$

question 9

Multiple Choice

If the wavelength of the background radiation peaked at 1 $\mu$ m at the time of recombination, how old was the universe then compared to its age today?

• A) 1/10th as old
• B) 1/100th as old
• C) 1/1,000th as old
• D) 1/10,000th as old
• E) 1/100,000 as old

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Definitions:

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the growing baby and removing waste products from the baby's blood.

Umbilical Cord

A flexible cord-like structure containing blood vessels that connects a fetus in the womb to its mother's placenta, providing oxygen and nutrients.

Yolk

The nutrient-rich central part of an egg that serves as food for the developing embryo in egg-laying animals.

Cephalocaudal Pattern

A principle of physical growth that states development progresses from the head (cephalo) towards the tail (caudal), meaning children typically gain control over the head, chest, and arm muscles before those of the legs.