Portion of mirror from which the reflection of light actually takes place is called

Kinetic energy is directly proportional to

centre of Spherical mirror

Rate of doing work

when a ray of light travells from a higher denser medium to lower denser medium is

When a magnetic field is charged near conductor, a current is produced in it this was discovered in

whose function is to prevent the eye ball from collapsing due to change in atmospheric pressure

Outer most covering of the eye ball

Lens which is thicker in middle and thiner at Edge

Si unit of power is

Angle of reflection is always what to the angle of incidence

when the ray of light strikes the surface of separation of two media at an angle of 90° it

Change of side of an object and its mirror image is called

A cell in which electrical energy is stored in the form of chemical energy such that when required the chemical energy its reconverted into electrical energy is called

It is the region on the retina where the optic nerve enters the eye ball and the image formed on this is not visible

Bundle of light ray is called

best reflector of light

Angle between two refracting faces is called

secondary cell was invented in

It is a line at a right angle to the mirror surface at the point of incidence

The band of seven color obtained on a screen when white light splits into seven color is called

It is attached to the sclerotic from the inner side and its function is to darken the eye from inside and prevent any internal reflection

1 joule equal to

Angle between incident ray and emergent ray is called

temperature of human body is

laboratory thermometer measures from

Ratio of the height of image to the height of object is called

If the mass of body is double , its kinetic energy gets

Simple voltaic cell was discovered in

Kinetic energy is

Simple voltaic cell was discovered by

The escape velocity for all the object from the earth is

Centre of glass

When magnet is suspenseded freely it always shows which direction

It is a piece of glass or any other transparent material which is bounded by two triangular surface & three rectangular surface is called

Dry leclanche cell developed in

The nerve ending from a hemi-spherical screen is called

Permanent magnets is made up of

Thermometer ranges from

Secondary cell was invented by

1 calori

small area facing the eye ball is

Si unit of energy

energy is

when a ray of light travells from a less denser medium to high denser medium is

It is the front bulging part of the eye and allow light to pass in the eye

cell which converts chemical energy into electrical energy and cannot function once the chemical are exhausted is called

It forms a very clear image by sending a large number of optical pulses to brain

SI unit of heat and energy is

image which can be obtained in screen

It is a circular diaphragm suspenseded in front of the crystalline Lens

It is the filling between cornea and crystalline Lens

It is a double convex Lens made of transparent tissue held in a position by

It is the sum of potential and kinetic energy

power is

Current produced in a closed coil when the magnetic lines are forced rapidly change within it is called

Magnification is equals to

Dry leclanche cell was discovered by

Principle of electromagnetic Induction is used in generating electric current by a device is called

Angle made by reflected ray with the normal at the point of incidence

power Equal to

When electric current flows around iron nail or an iron bar is it called

Only natural magnet known to man

Potential energy equal to

Energy of a body due to its motion

Phenomenon due to which a changing magnetic field within a closed coil induces an electric current is the coil is called

Kinetic energy equal to

Work equals to

If the magnification have plus sign , image is

whose function is to prevent front of the eye ball from collapsing with change in atmospheric pressure

incident ray,refracted ray and normal lie in the

The small opening in the iris of an eye is called

Modification of simple voltaic cell is

escape velocity from the moon is only what of that from earth

whose function is to control the amount of light entering in the eye

It is the jelly like fluid filling the part of eye between crystalline Lens and retina

Focal length

Daniel cell was discovered in

Unit of work

unit of power is

Daniel cell was discovered by

which is the world's first magnet

process by which ciliary muscle alter the focal length of the crystalline Lens so as to focus the nearer or the far off object clearly on the retina

Si unit of work

The property of light travelling in a straight path

light consists of which type of waves

It is a double convex Lens made of transparent tissue

image which can't be obtained in screen

The phenomenon due to which white light splits into seven color is called

Straight Line passing through centre of curvature and pole is called

kinetic energy is directly proportional to

When a magnetic field is charged near conductor, a current is produced in it this was discovered by

It is a mirror whose reflecting surface is the part of hollow sphere of glass

An angle made by incident ray and with normal at the point of incidence is called

is velocity is double the kinetic energy will be

Lens which is thin in middle and thicker at Edge

It is the energy of the body due to its position or change in shape

Branch of physics which deals with the relationship between electricity and magnetism is called

It receives the optical image of the object and convert it into optical pulse is called

If the magnification have negative sign then it image is