Question
A signal of $100 \,THz$ frequency can be transmitted with maximum efficiency by
✓
Answer
Optical fibre frequency range is $1 \,THz$ to $1000 \,THz$.
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
Two identical thin isosceles prisms of refracting angle $‘A’$ and refractive index $\mu$ are placed with their bases touching each other. Two parallel rays of light are incident on this system as shown. The distance of the point where the rays converge from the prism is :
→Dimensions of the following three quantities are the same
An object is placed beyond the centre of curvature ${C}$ of the given concave mirror. If the distance of the object is ${d}_{1}$ from ${C}$ and the distance of the image formed is ${d}_{2}$ from ${C}$, the radius of curvature of this mirror is
→A ball of mass $2\,m$ is moving with velocity $v$ on a smooth surface collides elastically headon with another ball of mass $m$. If ball of mass $m$ reaches upto top of frictionless elevated plane, then velocity $v$ of heavy ball must be
→The dimensional formula of farad is
The moment of inertia of a triangular plate $ABC$ of mass $M$ and side $BC = a,$ about an axis passing through $A$ and perpendicular to the plane of the plate is :-
→One mole of an ideal gas is taken from a to $b$ along two paths denoted by the solid and the dashed lines as shown in the graph below. If the work done along the solid line path is $\mathrm{w}_{\mathrm{s}}$ and that along the dotted line path is $w_d$, then the integer closest to the ratio $w_d / w_5$ is
→$A$ ball of mass $m$ is attached to the lower end of light vertical spring of force constant $k$. The upper end of the spring is fixed. The ball is released from rest with the spring at its normal (unstretched) length, comes to rest again after descending through a distance $x.$
→A $1\,m$ long copper wire carries a current of $1\,A$. If the cross section of the wire is $2.0\,mm ^{2}$ and the resistivity of copper is $1.7 \times 10^{-8}\,\Omega\,m$. the force experienced by moving electron in the wire is $\times 10^{-23}\,N$. (charge on electron $=1.6 \times 10^{-19}\,C$ )
→A spherical drop of oil of radius $1\, cm$ is broken into $1000$ droplets of equal radii. If the surface tension of oil is $50$ dynes/cm, the work done is
→