Question

Red light is least affected by atmospheric refraction due to:

Answer 1

Answer:

Since violet light has a shorter wavelength, it is slowed more than the longer wavelengths of red light. Consequently, violet light is bent the most while red light is bent the least

Answer 2

Red light is least affected by atmospheric refraction due to :

• HIGHER WAVELENGTH

Cauchy's Equation tells that :

• The deviation of any component of a polychromatic light is inversely proportional to the wavelength of the light.

$\mu = A + \dfrac{B}{ { \lambda}^{2} } + \dfrac{C}{ { \lambda}^{4} } + ...$

Neglecting the higher powers :

$\implies \mu = A + \dfrac{B}{ { \lambda}^{2} }$

• So, red light has higher value of $\lambda$. This will lead to a lower value of $\mu$. Lower value of refractive index will have a lower deviation.

Hope It Helps.