A Camera Lens Has a Focal Length of 50

question 14

Multiple Choice

A camera lens has a focal length of 50.0 mm and an aperture setting of f/4.00.What is the aperture diameter of this lens?

• A) 12.5 mm
• B) 10.1 mm
• C) 13.6 mm
• D) 14.2 mm
• E) 15.0 mm

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Definitions:

Melanoma

A type of skin cancer that develops from the pigment-producing cells known as melanocytes, which can become aggressive if not treated early.

Basal Cell Carcinoma

A type of skin cancer that begins in the basal cells and is often caused by exposure to ultraviolet (UV) light.

Squamous Cell Carcinoma

a type of cancer that begins in the squamous cells, which are flat cells found in the skin and other organs.

Eczema

A medical condition characterized by patches of skin that become inflamed, itchy, red, cracked, and rough.