Question

state the laws of reflection​

Answer 1

$\boxed{\huge{\sf{\red{Answer}}}}$

1. What is reflection ?

Reflection is a phenomenon seen in both transverse and longitudinal waves where the incident wave is returned back to the previous medium.

2. What are the Laws Of

Reflection ?

Reflection follows mainly 2 laws irrespective of smooth or rough surface . These are as follows :

• The Angle of incidence is equal to Angle of reflection.
• The Incident Ray , the normal and Reflected Ray lie on the same plane.

Diagram :

See the attached photo to understand the laws better.

Additional Important Information:

1. Angle of incidence is the angle between incident ray and normal.

2. Angle of Reflection is the angle between Reflected Ray and normal.

The normal is perpendicular to the reflecting surface.

Answer 2

$\boxed{ \bold{ \huge{ \orange{Answer}}}} \\ \\ \star \sf \: \bold{ \red{What \: is \: Reflection \: ?}} \\ \\ \longmapsto \sf \: Reflection \: is \: the \: change \: in \: direction \: of \: a \: wave \\ \sf \: at \: a \: boundary \: between \: two \: different \: media, \: so \: that \\ \sf\: the \: wave \: moves \: back \: into \: the \: medium \: it \: came \: from. \: \\ \sf The \: most \: common \: examples \: include \: the \: reflection \: \\ \sf \: of \: light, \: sound \: and \: water \: waves. \\ \\ \star \sf \: \bold{ \red{Facts \: :}} \\ \\ \longmapsto \sf \: The \: laws \: of \: reflection \: are \: valid \: at \: each \: point \: of \: \\ \sf \: any \: reflecting \: surface, \: whether \: plane \: or \: curved. \\ \\ \longmapsto \sf \: When \: light \: is \: reflected \: from \: a \: denser \: medium \\ \sf \: surface \: there \: is \: a \: phase \: change \: of \: \pi \: occurs \: but \: no \\ \sf \: phase \: change \: if \: it \: reflected \: from \: a \: rerer \: medium \: surface. \\ \\ \longmapsto \sf \: On \: reflection \: the \: velocity, \: wavelength \: and \: frequency \: \\ \sf \: of \: light \: do \: not \: change \: but \: amplitude \: or \: intensity \: of \: \\ \sf \: reflected \: ray \: is \: less \: than \: that \: of \: incident \: ray. \\ \\ \star \sf \: \bold{ \red{Laws \: of \: Reflection}} \\ \\ \longmapsto \sf \: angle \:of \: incident \: and \: angle \: of \: reflection \: are \\ \sf \: always \: same. \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \underline{\boxed{ \blue{ \sf{ \bold{ \angle \: \: i = \angle \: r}}}}} \\ \\ \longmapsto \sf \: incident \: ray \: reflection \: ray \: and \: normal \: of \: \\ \sf \: surface \: lie \: on \: the \: same \: plane$