A Contact Lens Is Made of Plastic with an Index

question 61

Multiple Choice

A contact lens is made of plastic with an index of refraction 1.50.The lens has an outer radius of curvature of +2.0 cm and an innerradius of curvature of +2.5 cm.What is its focal length?

• A)-20 cm
• B)+6.7 cm
• C)+10 cm
• D)+20 cm

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Definitions:

Consumer Surplus

The gap between the amount consumers are prepared to spend on a good or service and the actual price they pay, signifying consumers' advantage.

Refrigerator

An appliance used to keep food and drinks cool and preserved by maintaining a temperature below the ambient level.

Price Sensitivity

The degree to which the demand for a product or service is affected by changes in its price, illustrating consumer response to price adjustments.