If wavelength of a wave is $\lambda = 6000Å.$ Then wave number will be
A$166 \times {10^3}m^{-1}$
B$16.6 \times {10^{ - 1}}m^{-1}$
C$1.66 \times {10^6}m^{-1}$
D$1.66 \times {10^7}m^{-1}$
Easy
Download our app for free and get started
C$1.66 \times {10^6}m^{-1}$
c (c) $\bar n = \frac{1}{\lambda } = \frac{1}{{6000 \times {{10}^{ - 10}}}}$
$ = 1.66 \times {10^6}{m^{ - 1}}$
Download our app
and get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
A wire of density $9 \times 10^3 kg /m^3$ is stretched between two clamps $1 m$ apart and is subjected to an extension of $4.9 \times 10^{-4} m$. The lowest frequency of transverse vibration in the wire is ..... $Hz$ ($Y = 9 \times 10^{10} N / m^2$)
A stone is dropped in a well which is $19.6\,m$ deep. Echo sound is heard after $2.06\, sec$ (after dropping) then the velocity of sound is .... $m/sec$
A wave represented by the given equation $y = a\cos (kx - \omega \,t)$ is superposed with another wave to form a stationary wave such that the point $x = 0$ is a node. The equation for the other wave is
A source of sound $S$ of frequency $500 Hz$ situated between a stationary observer $O$ and a wall $W$, moves towards the wall with a speed of $2 m/s$. If the velocity of sound is $332 m/s$, then the number of beats per second heard by the observer is (approximately)
A hearing test is conducted on an aged person. It is found that her thresold of hearing is $20 \,dB$ at $1 \,kHz$ and it rises linearly with frequency to $60 \,dB$ at $9 \,kHz$. The minimum intensity of sound that the person can hear at $5 \,kHz$ is
When a tuning fork $A$ of unknown frequency is sounded with another tuning fork $B$ of frequency $256 Hz$, then $3$ beats per second are observed. After that $A$ is loaded with wax and sounded, the again $3$ beats per second are observed. The frequency of the tuning fork $A$ is ..... $Hz$
Wave has simple harmonic motion whose period is $4\; sec$ while another wave which also possesses simple harmonic motion has its period $3\; sec$. If both are combined, then the resultant wave will have the period equal to ....... $sec$