Short Answer

Perfectly elastic demand is a situation where a very small change in price causes an infinite or very large change in quantity demanded. In this case, consumers are extremely sensitive to price changes.

If the price increases even slightly, demand falls to zero. If the price decreases, demand increases greatly. This type of demand is mostly theoretical and rarely found in real life.

Detailed Explanation:

Meaning of Perfectly Elastic Demand

Definition

Perfectly elastic demand refers to a situation where the quantity demanded changes infinitely due to a very small change in price. In this case, the elasticity of demand is infinite.

This means consumers are highly sensitive to price. Even a small increase in price will cause buyers to stop purchasing the product completely. On the other hand, at a given price, consumers are willing to buy any quantity.

Example

In real life, perfectly elastic demand is rare, but it can be understood through examples. Suppose many sellers are selling identical products in a market, and all are selling at the same price. If one seller increases the price even slightly, buyers will shift to other sellers.

For example, in a highly competitive market with identical goods, consumers will not accept even a small price difference. So, demand for that seller becomes zero if the price increases.

Features of Perfectly Elastic Demand

Infinite Elasticity

The most important feature is that elasticity is infinite. This means a tiny change in price leads to a very large change in demand.

Single Price

There is only one price at which the product can be sold. If the price changes, demand will not exist at that price.

Horizontal Demand Curve

The demand curve in this case is a horizontal straight line. This shows that quantity demanded can change without any change in price.

Perfect Competition Situation

Perfectly elastic demand is mostly seen in a perfectly competitive market where many sellers offer identical products. Buyers have full information and can easily switch from one seller to another.

High Consumer Awareness

Consumers are fully aware of prices in the market. They always choose the seller offering the lowest price.

Conclusion

Perfectly elastic demand is a situation where consumers are extremely sensitive to price changes, and elasticity is infinite. Though it is mostly theoretical, it helps in understanding how demand behaves in highly competitive markets and explains the importance of pricing.