Question

1. What are the two laws of reflection of light?

2. What is the normal incidence?

3. What is the law of conservation of mechanical energy?

4. Give the formula of potential and kinetic energy.

5. Explain the factors on which the potential energy and kinetic energy of a body depends.

Pls, answer it fast. I will mark your answer as the Brainliest.








​

Answer 1

Explanation:

laws of reflection

I). incidence ray ,reflected ray and normal lies on same plane

ii). incidence angle and reflected angle are same

Answer 2

$</p><p>\huge{\green{\boxed{\boxed{\red{\ulcorner{\mid{\overline{\underline{\bf{Answer:-}}}}}}\mid}}}}$

⠀

Ans 1- The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

⠀

Ans 2- The condition in which a wave-front is parallel to an interface, such that the ray path is perpendicular (normal) to the surface.

⠀

Ans 3- This states that if a body or system is subjected only to conservative forces, the mechanical energy of that body or system remains constant.

⠀

Ans 4- ⠀⠀ ⠀⠀ • P.E. = mgh

⠀⠀⠀⠀ ⠀⠀ ⠀ ⠀• K.E. = 1/2 m v²

⠀

Ans 5- The kinetic energy of a moving body depends on the following two factors :

⠀

• (a) The mass of the body — Greater the mass of the body, higher is its kinetic energy.

• (b) The speed of the body — More the speed of the body, higher is its kinetic energy.

⠀