hence, d=10cm.
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 light short notes?
Light is an electromagnetic radiation which can be detected by human eye. It shows the properties of both waves and particles. Light exists in tiny energy pockets known as photons. The light wave has frequency as well as wavelength.
What is reflection of light notes?
When a ray of light approaches a smooth polished surface and the light ray bounces back, it is called the reflection of light. The incident light ray that land on the surface is reflected off the surface. The ray that bounces back is called the reflected ray.
What is reflection of light Class 10 Ncert?
Reflection of light is the phenomenon of bouncing back of light in the same medium on striking the surface of any object.
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 laws of reflection?
Law of reflection is defined as: The principle when the light rays fall on the smooth surface, the angle of reflection is equal to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface all lie in the same plane.
How many types of mirrors are there?
Three common types of mirror are the plane mirror, which has a flat, or plane, surface; the convex mirror; and the concave mirror.
How many types of light are there?
There are four main types of lights, or light bulbs, currently available on the market: Incandescent. CFL, or compact fluorescent lamp. Halogen.
What are the 3 types of reflection?
Reflection is divided into three types: diffuse, specular, and glossy.
What are the 3 laws of reflection?
Solution : There are three laws of reflection
1. The angle of reflection is equal to the angle of incidence .
2. The incident ray, the reflected ray and the normal lie in the same plane.
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 3 examples of real reflection?
- Reflection of light in mirror.
- Reflection of light in spherical mirror.
- Reflection of light in water pool.
- Reflection of light on polished surface.
- Object seen due to reflection of light.
- Glowing of stars.
- Lighting of moon at night.
- Reflection from luminous object.
What is mirror formula class 10th?
Hence, the equation of mirror formula is 1f=1v+1u. Note:The reflecting part of the concave spherical mirror is that which caves inwards and the reflecting part of convex spherical mirror is one which caves outwards. In convex mirror focal length f is positive and object distance u is taken as negative.
What is reflection give 2 examples?
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.
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).
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 are the 2 laws of refraction?
1. The incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane. 2. The ratio of the sine of the angle of incidence i to the sine of the angle of refraction is constant for the pair of given media.
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.
What is Snell’s first law?
So the angle associated with the incidence and refraction can have a relation to the refractive index of the two mediums. Snell’s First Law: It states that the incident ray, the refracted ray and the normal lie on the same plane.
What is called mirror?
A mirror is defined as a reflecting surface and can be explained by the law of reflection, which states that when a ray of light is made to fall on the reflecting surface, the incident ray, the reflected ray and the normal to the surface of the mirror all lie in the same plane and the angle of incidence is equal to the …