A mirage is observed when
A Density of air decreases with increase of height
B Density of air increases with increase of height
C Refractive index of air decreases with increase of height
D The Earth acts like a mirror.
A mirage is observed when
A Density of air decreases with increase of height
B Density of air increases with increase of height
C Refractive index of air decreases with increase of height
D The Earth acts like a mirror.