# What is refraction and its laws?

Refraction : The phenomenon of change in the direction of light when it passes from one transparent medium to another is called refraction. Laws of refraction: (i) The incident ray, the refracted ray and the normal to the interface of two transparent media at the point of incidence, all lie in the same plane.

## What is reflection and refraction of light Class 10?

Bouncing back of light rays after hitting any surface is called reflection of light. The densities of all media are different, hence the speed of light varies as it passes from one medium to the other. Bending of light rays as they pass from one medium to the other is called refraction of light.

## What is reflection of light in physics class 10?

Reflection is the phenomenon of bouncing back of the rays of light when they fall on an obstacle. It is similar to the bouncing of a ball when we throw it on a rigid surface. When light rays fall on an object, some of them are reflected, some pass through it and the rest of the light rays are absorbed by the object.

## What is the name of Chapter 10 science class 10?

NCERT Solutions for Class 10 Science Chapter 10: Light Reflection and Refraction.

## What is refraction of light class 10 topper?

Refraction is the bending of a wave of light when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.

## What is mirror formula?

The relation between focal length of mirror, distance of the object and distance of the image is known as mirror formula. It is given by. u1+v1=f1.

## WHAT IS lens formula?

What is the Lens Formula? According to the Convex Lens equation, the Lens formula is 1/f = 1/v + 1/u. It relates the Focal Length of a Lens with the distance of an object which is placed in front of it and the image formed of that object. Lens magnification is defined as the ratio of the image Length and object Length.

## What are the three types of reflection?

Reflection is divided into three types: diffuse, specular, and glossy.

## What are the two laws of reflection?

Laws of reflection are: (i) The incident ray, the reflected ray and the normal ray at the point of incidence, lie in the same plane. (ii) The angle of incidence is equal to the angle of reflection.

## What are the two types of reflection?

The reflection of light can be roughly categorized into two types of reflection. Specular reflection is defined as light reflected from a smooth surface at a definite angle, whereas diffuse reflection is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 3).

## What are the formulas of light Class 10?

• Mirror formula, 1v+1u=1f (f is focal length, u is image distance and u is object distance)
• Magnification (mirror) = hightofimagehightofobject=hiho=−vu (hᵢ is image height and hₒ is object height)
• Lens formula, 1v−1u=1f.

## What is Snell’s law class 10?

Snell’s law is defined as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given pair of media”.

## What are the laws of reflection class 10?

The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. The angle of reflection is equal to the angle of incidence.

## What are the 3 laws of refraction?

• The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane.
• The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.

## What is refraction of light with diagram?

We can define it as the change in direction of a wave passing from one medium to another or from a gradual change in the medium. Laws of refraction state that: The incident ray refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.

## What is the unit of mirror?

In a spherical mirror: The distance between the object and the pole of the mirror is called Object distance(u). The distance between the image and the pole of the mirror is called Image distance(v). The distance between the Principal focus and the pole of the mirror is called Focal Length(f).

## What is image distance?

Image Distance, s’, is the distance from a lens or mirror to an image. • Magnification, m, is the amount of size increase (or decrease) of the image as compared to the object. m = hi /ho • Images are formed by lenses and mirrors where light rays cross or focus.

## What is V in lens formula?

where u is the distance of the object from the lens; v is the distance of the image from the lens and f is the focal length, i.e., the distance of the focus from the lens. N.B. other sign conventions are sometimes used in the literature. = 2 6 − 1 6 = 1 6 So v = 6 cm.

## What is the SI unit of power of lens?

Power of a lens is equal to reciprocal of the focal length of the lens.SI unit of power is dioptre (D).

hence, d=10cm.

## What is C in lens?

(a) Centre of curvature: It is the centre of the spheres of which each surface of the lens forms a part.Represented by C or 2f. (b) Principal axis: An imaginary straight line passing through the two centres of curvatures. (c) Optical centre: It is the central point of the lens.

## What is reflected light called?

Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called specular reflection.

## What is the formula of reflection of light?

Figure 1.5 The law of reflection states that the angle of reflection equals the angle of incidence— θ r = θ i . θ r = θ i .

## What causes reflection?

Reflection occurs when light traveling through one material bounces off a different material. The reflected light still travels in a straight line, only in a different direction. The light is reflected at the same angle that it hits the surface. The angle of incidence is equal to the angle of reflection.

## What’s the angle of reflection?

The angle of reflection of a ray or beam is the angle measured from the reflected ray to the surface normal. From the law of reflection, , where is the angle of incidence. is measured between the ray and a line normal to the surface that intersects the surface at the same point as the ray.