Question

In a vessel of 1.2m depth, upto what height the water should be filled so that now it appears to
be half filled if viewed from the top? (u of water = $)
A 60 cm
B 75 cm
C
80 cm
D
100 cm​

Answer 1

Answer:

A. 60 CM

Explanation:

because 1.2m = 120cm and half means divide by 2, therefore 120cm/2 = 60cm.

Answer 2

Answer:

The correct answer is 68.5cm

Explanation:

convert 1.2m into 120cm.

Let the water be filled upto height x so that bottom of container appear to raised upto (120-x)cm

Apparent depth h'=(120-x)cm

Real depth h=x

refractive index u= h/h'

4/3=x/120-x

x=68.5cm

Refractive index:The ratio of the speed of light in a vacuum to its speed in a specific medium.

Refractive index is also referred to as refraction index or index of refraction.

How it varies with wavelength:

According to the definition of the refractive index, the speed of light is the product of frequency and wavelength. The frequency of the light wave remains unchanged, irrespective of the medium. Whereas the wavelength of the light wave changes based on refraction. Hence, the refractive index varies with wavelength.

Unit of refractive index:

Refractive index for a medium may be defined as the ratio of speed of light in vacuum to the speed of light in that particular medium. Refractive index is a pure ratio and hence it do not have a unit.

For more references:

https://brainly.in/question/3306087?utm_source=android&utm_medium=share&utm_campaign=question

https://brainly.in/question/3831552?utm_source=android&utm_medium=share&utm_campaign=question

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