The transition from the state n=4 to n=3 in a hydrogen like atom results in ultraviolet radiation Infrared radiation will be obtained in the transition from
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Two aeroplanes I and II bomb a target in succession. The probabilities of I and II scoring a hit correctly are 0.3 and 0.2, respectively. The second plane will bomb only if the first misses the target. The probability that the target is hit by the second plane is
If (2, 3, 5) is one end of a diameter of the sphere x2+y2+z2−6x−12y−2z+20=0, then the coordinates of the other end of the diameter are
In an experiment the angles are required to be measured using an instrument 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half-a-degree (=0.5∘), then the least count of the instrument is
The point diametrically opposite to the point P (1, 0) on the circle x2+y2+2x+4y−3=0is
Calculate the wavelength (in nanometer) associated with a proton moving at 1.0×103ms−1 (Mass of proton =1.67×10−27kgandh=6.63×10−34Js)
If ∣z+4∣≤3, then the maximum value of ∣z+1∣ is
The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be