Question

which of the following events causes the apparent position of a star? 1️⃣ diffraction of light cause by water droplets , 2️⃣ Refraction of light due to changing refractive index air , 3️⃣ sctrring of light due to dust particles, 4️⃣ internal reflections of light in the clouds​

Answer 1

Answer:

2️⃣ Refraction of light due to changing refractive index of air

Atmospheric Refraction phenomenon

Answer 2

The responsible event for causing a change in the position of stars is :

Option 2. Refraction of light due to changing refractive index air.

• Light is one such phenomenon whose path can be modified by the medium it traverses in.
• As it reaches our eyes, passing through layers and layers of the atmosphere, the mechanism of refraction takes places causing the light to deflect from its original path and this process happens constantly.
• This deflection from its original path creates an illusion of sorts on our eyes making the star seem to be in a different place than it actually is in.
• Thereby as an observer from the earth, we see some variation in the said position of the star and its actual location.