MCQ
Biaxial crystal among the following is
- ACalcite
- BQuartz
- CSelenite
- ✓Tourmaline
✓
Answer
Correct option: D.
Tourmaline
d
(d)Tourmaline crystal is biaxial.
(d)Tourmaline crystal is biaxial.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In the logic circuit shown in the figure, if input $A$ and $B$ are $0$ to $1$ respectively, the output at $Y$ would be ' $x ^{\prime}$. The value of $x$ is...........
→Two slits are made $1\, mm$ apart and the screen is placed $1\, m$ away. The fringe saperation when monochromatic light of wavelength $500\, nm$ is used is
→Water molecule is the example of:
Huygen’s principle of secondary wavelets may be used to
Two charged spheres separated at a distance d exert a force F on each other. If they are immersed in a liquid of dielectric constant 2, then what is the force (if all conditions are same)
A student obtained following observations in an experiment of meter bridge to find the unknown resistance of the circuit The most accurate value of unknown resistance is ............ $\Omega$
→| S.No. | $R$ | $l$ | $100-l$ | $S = \left( {\frac{{100 - l}}{l}} \right)R$ |
| $1$ | $20\,\Omega $ | $43$ | $57$ | $26.51\,\Omega $ |
| $2$ | $30\,\Omega $ | $51$ | $49$ | $28.82\,\Omega $ |
| $3$ | $40\,\Omega $ | $59$ | $41$ | $27.80\,\Omega $ |
| $4$ | $60\,\Omega $ | $70$ | $30$ | $25.71\,\Omega $ |
The total power dissipated (in $watt$ ) in the circuit shown is
→The electric field due to a uniformly charged sphere of radius $R$ as a function of the distance $r$ from its centre is represented graphically by
→A $400\, pF$ capacitor is charged with a $100\, V$ battery. After disconnecting battery this capacitor is connected with another $400\, pF$ capacitor. Then find out energy loss.
→The angle of incidence for an equilateral prism is $45^o$, what should be the refractive index of prism material so that the ray is parallel to the base inside the prism
→