Q. Experimental observations have shown that X-rays (i) travel in vacuum with a speed of 3×10^8m/s , (ii) exhibit the phenomenon of diffraction and can the polarized. What conclusion can be drawn about the nature of X -rays from each of these observations?

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A ray of light travelling from medium I in which speed of light is $2 \times 10^{8} m / s$ to a medium II in which speed of light is $1.5 \times 10^{8} m / s$ . Choose the correct ray diagram:

I. $u = 2 \times 10^{8} m / s$

II. $v = 1.5 \times 10^{8} m / s$

Q. Yellow light is used in a single slit diffraction experiment with slit width of

0.6 m m

. If yellow light is replaced by X-rays, then the observed pattern will reveal.

Q. Yellow light is used in a single slit diffraction experiment with a slit of width

0.6 m m

. If yellow light is replaced by

X -

rays, then the observed pattern will reveal :

Q. What conclusion can be drawn from experiment I?

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30^{o}

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. The interplanar spacing of the crystal diffracting these X-rays will be:

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