A man of height 1.47 m stands on a strai...

A man of height 1.47 m stands on a straight road on a hot day. The vertical temperature in the air results in a variation of refractive index with height y as `mu=mu_(0)sqrt((1+ay))` where `mu_(0)` is the refractive index of air near the road a `=1.5xx10^(-6)`/m. What is the apparent length of the road man is able to sec?

700m

2000m

`700sqrt2`

infinite distance

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