What are similarities and differences between refraction, reflection, diffraction and absorption?

Refraction and reflection both shows the wave property of light and the difference between them is that during reflection the medium of light will not change while in refraction the light will change its medium

so in reflection of light we use that angle of incidence = angle of reflections with respect to normal

While in refraction we use Snell's law

Diffraction of light is the phenomenon of light in which light will bend at the corners and enter into the region of dark

While absorption is the phenomenon of energy absorption when light incident on any medium or surface

neither accurate nor precise.

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