Snells law gives the relationship between angles of incidence and angle of refraction. The refractive index of xrays is slightly less than 1. To determine refractive index of a glass slab using a travelling. To find refractive index of a liquid by using i concave mirror, ii convex lens and plane mirror. Open this interactive virtual physics lab application and do it yourself. Refractive index of a glass slab using a travelling. Use of the noparallax technique to locate an apparent image of a real object 2. Determination of the refractive index of a liquid using.
Ncert class 10 science lab manual refraction through glass slab. Jan 17, 2020 ncert class 10 science lab manual refraction through glass slab. When observing from the same position, the coin in cup. Borosilicate glasses are known for having very low coefficients of thermal expansion, which makes them resistant to. When light travels from one medium to another, it generally bends,this bending is called refraction. Similarly, the refractive index of crown glass, ng 1. To find the refractive index of a liquid by using convex lens and plane mirror. Cup a is partially filled with water and cup b is totally filled with water.
Place the ink dot paper on the base of the microscope. The glass prism spectrometer is suitable for measuring ray deviations and refractive indices. Finding refractive index using travelling microscope for glass slab. Reading when microscope focused on main scale reading a cm vernier scale reading b total reading cbxl. A virtual science practical related with optical physics. Most prospecting questions in physicsii for cbse2017.
It carries a vernier scale along the main scale and can be moved upward or downward. Physics lab activity bookclassxiifree practical based mcq. Focus again the microscope on through travelling screw only. When light moves from one medium to another, it changes its direction, i. To find refractive index of glass ing travelling microscope prakash.
Refractive index of glass definition, examples, diagrams. To determine the refractive index of a glass slab using a travelling microscope. Experiment 14 travelling microscope refractive index of glass slab. Most prospecting questions in physicsii for cbse2017 sample. To find refractive index of glass ing travelling microscope prakash duration. Refractive index of bsg, borosilicate glass, microscope slide. Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. In this paper the main properties of a prism of initially unknown refractive index and material will be analysed. Free download online model sample paper and list of. Mar 11, 2017 how is apparent depth and real depth related to refractive index. Determining the refractive index of a glass slab using a.
A travelling microscope is an instrument for measuring length with a resolution typically in the. With respect to air the refractive index of ice and rock salt benzene are 1. The main scales divisions along with vernier scale divisions are marked on the horizontal base and the vertical pillar as shown in fig. Physics practical measurement of diameter of capillary tube. Determination of the refractive index of a glass block using. Stay tuned with byjus to learn more about other physics related experiments. A similar coin is placed at the bottom of each cup. To draw the iv characteristic curve of a pn junction in forward bias and reverse bias. Physics practical measurement of diameter of capillary. Cbse physics practical class 12 lab manual learn cbse. The variation of refractive index with wavelength is the source of chromatic aberration in lenses. The following experiment was carried out to investigate refractive index using a travelling microscope. Three glass slabs of different thickness but same material, a travelling microscope, lycopodium powder.
To draw the iv characteristics curves of a pn junction in forward bias and reverse bias. Cbse physics lab manual for class 12 pdf download 9. It is used in laboratories to measure the refractive index of liquids using the geometrical concepts of ray. The system, which incorporates many years of experience with the analysis of glass, allows the user to analyze the refractive index of multiple glass fragments simultaneously and with. Common microscope slides are made of sodalime glass, which have a refractive index of 1. To determine specific heat capacity of a given i liquid ii solid, by method of mixtures. The last decade witnessed a giant leap in the design of new optical technology with the. Travelling microscope consists of an ordinary compound microscope which slides along a graduated vertical pillar, attached to horizontal base resting on the leveling screws. Refractive index of bsg, borosilicate glass, microscope slide borosilicate glass bsg is a class of moderaterefractiveindex glass comprised of silicon dioxide and boron oxide. Object to determine the surface tension of water from capillary to determine the refractive index of given glass using trvelling microscope to measure refractive index by the real and appa depth method measuring refractive index using travelling microscope physics sem 2 partical second semester practical ii refractive.
To find the refractive index of a liquid by using a convex lens and plane mirror. To measure the microscopic reading when the ink dot in a paper solid and a pin in a beaker liquid is focused 2. We know that, with respect to air the refractive index of ice and rock salt benzene i r n a r n a n i 1. Underlying physics the travelling microscope allows for the measurement of very small distances. Determination of the refractive index of a liquid using the apparent depth method pack contents. This means that the ratio of the speed of light in air and the speed of light in water is equal to 1. Physics lab activity bookclassxiifree practical based. Aim the experiment is to enable the students to observe the image formed of an optical pin in the glass block and also use the data obtained to determine the refractive index of the glass block. Exp14 to determine refractive index of a glass slab or transparent liquid using a traveling microscope. Refractive index is also equal to the velocity c of light of a given wavelength in empty space divided by its velocity in a substance, or v n c v. How to find out the refractive index of glass slab with help of travelling microscope. The last decade witnessed a giant leap in the design of new optical technology with the use of laser beam due to its high degree of coherence. To determine refractive index of a glass using a travelling microscope.
Refractive index water using travelling microscope. In a typical travelling microscope, the main scale divisions are of magnitude 0. To determine the refractive index of a glass slab, using a travelling microscope. Also determine the refractive index of the glass prism. The measurement principle is based on the principle of vernier. To determine refractive index of a glass slab using a travelling microscope. All faces are transparent and opposite faces are parallel. Refractive index of prism material, glass slab and transparent liquid. To find the refractive index of a liquid water using a concave mirror. To plot the graph showing the variation of the angle of deviation with the angle of incidence using glass prism. Ncert class 10 science lab manual refraction through glass. A slab is a piece of transparent material with rectangular faces. And i am sure that in the above situation the below refractive index formula wont work. How is apparent depth and real depth related to refractive index.
Note the main scale reading and the vernier scale readings on the vertical scale. From the table you can know that the refractive index of water, nw 1. The difference in distance travelled by a ray of light passing through air and a ray of light passing thorough glass can be measured. Refractive index of bsg, borosilicate glass, microscope slide borosilicate glass bsg is a class of moderate refractive index glass comprised of silicon dioxide and boron oxide. Determine the refractive index of glass slab using travelling. Jee mains refraction of light lenses and optical instruments questions. Given liquid or glass slab, glass beaker, traveling microscope, lycopodium powder, pin, etc. Now focus at the ink dot and note down the position of the microscope noting down the reading on the vertical scale. A travelling microscope is used to determine small distance to an accuracy of 0. Nov 17, 2015 the refractive index of several media is given in table 1. Class 10 physics practical glass slab introduction. This method required complicated 3d reconstruction algorithms and could only work for very thin.
A glass slab, travelling microscope, lycopodium powder. Calculate the refractive index of rock salt with respect to ice. Refractive index of bsg, borosilicate glass, microscope. Use the formula to calculate refractive index n of the glass slab. Unfortunately, the abbe refractometer suits best for the assessment of refractive index of transparent liquids 2. Measuring the refractive index understanding standards. The refractive index of several media is given in table 1. Determination of the refractive index of a liquid using the. Apr 22, 2020 to determine the refractive index of a glass slab using a travelling microscope.
Determination of the refractive index of a glass block. Some typical refractive indices for yellow light wavelength equal to 589 nanometres 10. Drawing board, sheet of paper, board pins, rectangular glass slab. The refractive index determines how much light is bent, or refracted, when entering a material. Aug 06, 2011 i need the correct readings of this expto determine the refractive index of a glass slab using a travelling microscope 0 0 0 log in to reply to the answers post. Phy pack 4 refractive index law 2 produced by physics group, university of cape coast, as part of a delphe funded project title. Depending on the type of glass your glass slab is made of, it will have a different refractive index. Aim to determine refractive index of a glass slab using a travelling. To determine refractive index of a glass slab using a travelling m icroscope. Place the travelling microscope near the window so. Diploma in basic education students also suitable for. In this practical video of finding the refractive index, the reading is being taken by placing the travelling microscope perpendicular to the slab. Travelling microscope is a compound microscope that is fitted on the vertical scale.
The glassprism spectrometer is suitable for measuring ray deviations and refractive indices. Make a black ink dot as much as small on the paper. Make the microscope vertical and focus on the dot at p, so that there is no parallax between the cross wires and the image of the mark p. But ive learned in another video if you are watching directly from the above incident angle is 0 then the real depth apparent depth. Borosilicate glasses are known for having very low coefficients of thermal expansion, which makes them resistant to thermal shock.
If i is the angle of incidence of a ray in vacuum angle between the incoming ray and the perpendicular to the surface of a medium, called the normal and r is the angle of refraction angle between the ray in. Finding refractive index using travelling microscope for. Describe an experiment to find the refractive index of a. The refracting prism is made of a glass with a high refractive index e. Apparatus and material required a travelling microscope, a glass slab, lycopodium powderchalk dust and a paper. If i is the angle of incidence of a ray in vacuum and r is the angle of refraction, the refractive index n is defined as the ratio of the sine of the angle. To determine refractive index of a glass slab using a. Dec 02, 2016 to determine refractive index of a glass slab using a travelling microscope. Oct 05, 2017 travelling microscope practical demonstration. Determination of the refractive index of a glass block using law target group. Refraction, law, realapparent depth method, geometric optics. To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are.
978 1301 634 1290 1166 157 1504 1553 857 530 115 445 1643 974 25 192 480 1326 833 333 191 1510 782 1531 1013 713 1489 1002 866 913 1360 735 934 620 1256 91 221