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7. (a) Explain the measurement of wave-length by the interferometer.

(b) Explain what is meant by "resolving-power of a telescope."

8. (a) State the laws of radiation.

(b) Describe some form of optical pyrometer.

(c) Give an account of the Zeeman effect.



(Any six questions).

1. Explain the method of determining g with Kater's pendulum.

2. Explain the inclined plane method of determining the coefficient of friction.

3. (a) What is meant by absolute zero of temperature? (b) Give concise definitions of the following terms: Power, work, centre of gravity, surface tension, saturated vapour, boiling point of a liquid, plane polarized light, magnetic permeability.

4. Explain Doppler's Principle and give one application.

5. Give a full explanation of the phenomenon of resonance, and give illustrations.

6. Discuss the Young-Helmholtz theory of colour vision.

7. Write a note on the discharge of a Leyden jar, and give applications.

8. Explain the phenomenon as Newton's Rings. Why is the central spot black when viewed by reflected light?





1. Briefly describe the structure and the reproduction of the following named kinds of plants:-Volvox, Vaucheria, Sphaerella, Coleochaeta, Marchantia, Sphagnum, and Polypodium.

2. Distinguish from each other the fungi described as: Phycomycetes, Ascomycetes, Uredomycetes, and Basidiomycetes.

3. Outline the life history of Saprolegnia, Mucor, Agaricus, and Puccinia.

4. Describe the most complex type of herbaceous sporophyte, and the most complex existing type of gametophyte.

5. Describe the vascular bundles of (a) the roots, (b) the stems, of Pteridophytes, Gymnosperms, Monocotyledons, and Dicotyledons.

6. Trace the advance in structure of flowers through the Pandanales, Graminales, Liliales, and Orchidales.

7. Describe the advances in inflorescence and in flower structure from Ranales, through Rosales, and Umbellales to the Compositae.

8. Why is Selaginella a Cryptogam while Pinus is a Phanerogam?

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