(i) No, magnified image of an object cannot be formed by a concave lens ever. (ii) An object be placed in case of a convex lens to form an image of same size as of the object - At 2f. (iii) Image obtained is virtual, erect and diminished in case of concave lens. Like...pls...👍👍👍
(i) No, magnified image of an object cannot be formed by a concave lens ever.
(ii) An object be placed in case of a convex lens to form an image of same size as of the object – At 2f.
(iii) Image obtained is virtual, erect and diminished in case of concave lens.
Planaria can be cut into any number of pieces and each piece grows into a complete organism. This process is called regeneration. Regeneration is carried out by specialised cells. When a Planaria is cut into three pieces, each of its pieces grow into separate individual; specialized cells proliferatRead more
Planaria can be cut into any number of pieces and each piece grows into a complete organism. This process is called regeneration. Regeneration is carried out by specialised cells.
When a Planaria is cut into three pieces, each of its pieces grow into separate individual; specialized cells proliferate; mass of cells get differentiated into various cells and tissues.
Another example of an organism showing the characteristics is Hydra. Diagram:
• Isomers: Compounds which have same molecular formula and different structural formula. • In first three members of alkane series, branching is not possible, therefore isomers are not possible. • Two isomers of butane C4H10.
• Isomers: Compounds which have same molecular formula and different structural formula.
• In first three members of alkane series, branching is not possible, therefore isomers are not possible.
• Two isomers of butane C4H10.
(i) Rohit claims to have obtained an image twice the size of object with a concave lens. Is he correct? Give reason for your answer. (ii) Where should an object be placed in case of a convex lens to form an image of same size as of the object? Show with the help of ray diagram the position and the nature of the image formed. (iii) With the help of ray diagram, illustrate the change in position, nature and size of the image formed if the convex lens in case of (ii) is replaced by concave lens of same focal length.
(i) No, magnified image of an object cannot be formed by a concave lens ever. (ii) An object be placed in case of a convex lens to form an image of same size as of the object - At 2f. (iii) Image obtained is virtual, erect and diminished in case of concave lens. Like...pls...👍👍👍
(i) No, magnified image of an object cannot be formed by a concave lens ever.
(ii) An object be placed in case of a convex lens to form an image of same size as of the object – At 2f.
(iii) Image obtained is virtual, erect and diminished in case of concave lens.
Like…pls…👍👍👍
See lessA concave lens has a focal length of 50 cm. Calculate its power.
Where f is the focal length of the lens.
Where f is the focal length of the lens.
See lessExplain with the help of labelled diagrams the development that takes place in each of the body parts of a Planaria where body is cut into three pieces. None this process and give an example of an organism in which a similar process can be observed.
Planaria can be cut into any number of pieces and each piece grows into a complete organism. This process is called regeneration. Regeneration is carried out by specialised cells. When a Planaria is cut into three pieces, each of its pieces grow into separate individual; specialized cells proliferatRead more
Planaria can be cut into any number of pieces and each piece grows into a complete organism. This process is called regeneration. Regeneration is carried out by specialised cells.
When a Planaria is cut into three pieces, each of its pieces grow into separate individual; specialized cells proliferate; mass of cells get differentiated into various cells and tissues.
See lessAnother example of an organism showing the characteristics is Hydra. Diagram:
An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y and Z. Also write chemical equations to show the formation of Y and Z.
X- Ethanol C2H5OH Y- Ethanoic acid CH3COOH Z- Ester CH3COOC2H5
X- Ethanol C2H5OH
See lessY- Ethanoic acid CH3COOH
Z- Ester CH3COOC2H5
What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, C4 H10.
• Isomers: Compounds which have same molecular formula and different structural formula. • In first three members of alkane series, branching is not possible, therefore isomers are not possible. • Two isomers of butane C4H10.
• Isomers: Compounds which have same molecular formula and different structural formula.
See less• In first three members of alkane series, branching is not possible, therefore isomers are not possible.
• Two isomers of butane C4H10.