Match List - I with List - II. List-I List-II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d) Source of X -rays (iv) Vibration of atoms and molecules (v) LASER (vi) RC circuit Choose the correct answer from the options given below:

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

(a)-(ii), (b)-(iv), (c)-(vi), (d)-(iii)

(a)-(vi), (b)-(iv), (c)-(i), (d)-(v)

(a)-(vi), (b)-(v), (c)-(i), (d)-(iv)

Biopiracy may be defined as the robbery of indigenous knowledge of nature, naturally-occurring biological resources and genetic materials of a country by the technologically advanced country or organisation for commercial purpose or profit without any permission from or air compensation recognition to the peoples or nations in whose territory the materials were originally developed.

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Which crop's demand increased in India due to the American Civil War?

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Important Questions on Electromagnetic Waves

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Select two disease resistant crop varieties from the list of crop varieties given below:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in a boll worm?

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

How has the use of Agrobacterium as vectors helped in controlling Meloidogyne incognita infestation in tobacco plants? Explain in the correct sequence.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Derive the expression for the fringe width in Young's double slit experiment.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Long distance short- wave radio broadcasting uses

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Consider a Young's double slit experiment as shown in figure. What should be the slit separation

d

in terms of wavelength

λ

such that the first minima occurs directly in front of the slit

(S_{1})

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

A corn farmer has perennial problem of corn-borer infestation in his crop. Being environmentally conscious he does not want to spray insecticides. Suggest solution based on your knowledge of biotechnology. Write the steps carried out to achieve it.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Obtain the expression for the fringe width of interference fringes in Young's Double slit experiment.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Equation for wave vector is:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Which part of the tobacco plant is infected by Meloidogyne incognita?

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Derive the expression for the intensity at a point where interference of light occurs. Arrive at the conditions for maximum and zero intensity.

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Match List - I with List - II.

List-I		List-II
(a)	Source of microwave frequency	(i)	Radioactive decay of nucleus
(b)	Source of infrared frequency	(ii)	Magnetron
(c)	Source of Gamma Rays	(iii)	Inner shell electrons
(d)	Source of $X$ -rays	(iv)	Vibration of atoms and molecules
		(v)	LASER
		(vi)	RC circuit

Choose the correct answer from the options given below:

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

What kind of fringes do you expect to observe if white light is used instead of monochromatic light?

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

Nematode specific genes were introduced into the tobacco host plant using a vector

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Physics>Modern Physics>Electromagnetic Waves>Sources of Electromagnetic Waves

If one of two identical slits producing interference in Young’s experiment is covered with glass, so that the light intensity passing through it is reduced to