356547 If the wavelength of first transition of the Balmer series is displaced by \(\Delta \lambda = 0.2\)\( \mathop A^{~~\circ} \), then the velocity of the excited hydrogen atoms is found to be \({N} \times 10^{3} {~m} / {s}\). When their radiations are observed at an angle \(\theta=60^{\circ}\) to their motion, then the value of \({N}\) is
[Take \({R}=10^{7} {~m}^{-1}\) ]

356548 White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is

356549 Assertion :
In photoemissive cell inert gas is used.
Reason :
Inert gas in the photoemissive cell gives greater current.

356550 Assertion :
LASER is used to measure distant objects.
Reason :
LASER is highly coherent source of light.

356547 If the wavelength of first transition of the Balmer series is displaced by \(\Delta \lambda = 0.2\)\( \mathop A^{~~\circ} \), then the velocity of the excited hydrogen atoms is found to be \({N} \times 10^{3} {~m} / {s}\). When their radiations are observed at an angle \(\theta=60^{\circ}\) to their motion, then the value of \({N}\) is
[Take \({R}=10^{7} {~m}^{-1}\) ]

356548 White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is

356549 Assertion :
In photoemissive cell inert gas is used.
Reason :
Inert gas in the photoemissive cell gives greater current.

356550 Assertion :
LASER is used to measure distant objects.
Reason :
LASER is highly coherent source of light.

356547 If the wavelength of first transition of the Balmer series is displaced by \(\Delta \lambda = 0.2\)\( \mathop A^{~~\circ} \), then the velocity of the excited hydrogen atoms is found to be \({N} \times 10^{3} {~m} / {s}\). When their radiations are observed at an angle \(\theta=60^{\circ}\) to their motion, then the value of \({N}\) is
[Take \({R}=10^{7} {~m}^{-1}\) ]

356548 White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is

356549 Assertion :
In photoemissive cell inert gas is used.
Reason :
Inert gas in the photoemissive cell gives greater current.

356550 Assertion :
LASER is used to measure distant objects.
Reason :
LASER is highly coherent source of light.

356547 If the wavelength of first transition of the Balmer series is displaced by \(\Delta \lambda = 0.2\)\( \mathop A^{~~\circ} \), then the velocity of the excited hydrogen atoms is found to be \({N} \times 10^{3} {~m} / {s}\). When their radiations are observed at an angle \(\theta=60^{\circ}\) to their motion, then the value of \({N}\) is
[Take \({R}=10^{7} {~m}^{-1}\) ]

356548 White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is

356549 Assertion :
In photoemissive cell inert gas is used.
Reason :
Inert gas in the photoemissive cell gives greater current.

356550 Assertion :
LASER is used to measure distant objects.
Reason :
LASER is highly coherent source of light.