Question

$\huge\gray{\underline{\sf{Hello \; Guys \; !}}}$

➪ᴡʜᴀᴛ ɪs ʟɪɢʜᴛ ?

ɢɪᴠᴇ ᴀʟʟ ᴛʜᴇ ᴅᴇғɪɴɪᴛɪᴏɴ ᴀʙᴏᴜᴛ ɪᴛ :/


⟶ɴᴏ ɪʀʀᴇʟᴇᴠᴀɴᴛ ᴀɴsᴡᴇʀ ☒
⟶ᴀɴsᴡᴇʀ ᴄʟᴇᴀʀʟʏ!!

​

Answer 1

$\huge \rm \: ʟɪɢʜᴛ$

Light is a form of energy it is energy in motion in the form of Radiant energy it can be converted to and form other forms of energy which can travel through vacuum with a speed of 3×10^8 m/s.

Any substance through which light passes is called medium.

$\large\rm \red {ʀᴇғʟᴇᴄᴛɪᴏɴ \: ᴏғ \: ʟɪɢʜᴛ}$

When a beam of light is incident on a plane surface a part of it is returned in the same medium the return of light into the same medium in this manner is called reflection.

Some terms related to reflection

• Incident ray = The light ray striking a surface is called the incident Ray.

• Point of incidence = the point at which the incident ray strikes the surface is called the point of incidence

• reflected ray = the light ray of tenth after reflection from the surface in the medium in which the incident rays coming is called the reflected ray

• Normal = the perpendicular drawn to the surface at the point of incidence is called the normal.

$\large\rm \red {ʀᴇғʀᴀᴄᴛɪᴏɴ \: ᴏғ \: ʟɪɢʜᴛ}$

Any homogeneous medium light travels in a straight line path but when light passes from one optical density of the medium to the other it gets divided from the original part the bending of light on a boundary of two media is called refraction of light.

$\sf \bigstar \: refractive \: index \implies \frac{velocity \: of \: light \: in \: air \: }{velocity \: of \: light \: in \: other \: medium}$