Acertain kind of glass has nblue = 1.64 for blue light and nred = 1.54 for red light. if a beam of white light (containing all colors) in air is incident at an angle of 48°, what is the angle between the red and blue light inside the glass?

The angle between the red and blue light inside the glass is 1.9°.

Explanation:

Given that,

Refractive index

For blue = 1.64

For red = 1.54

Incident angle = 48°

We need to calculate the angle between the red and blue light inside the glass

Using Snell's law

For blue ray,

For red ray,

We need to calculate the angle between the red and blue

Put the value into the formula

Hence, The angle between the red and blue light inside the glass is 1.9°.

a straight line sloped

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s