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1. far point of a myopic person is 40 cm. To see the distant objects clearly, the focal length and the power of the lens used should be (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)
-40 cm, -2.5 D
-25 cm, -4.0 D
40 cm, -2.5 D
-40 cm, +2.5
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2. The frequency of light of wavelength 5000 A is (NTSE West Bengal, Stage-I, 2013-14)
1.5 x 105 Hz
6 x108 Hz
6 x 1014 Hz
7.5 x 1015 Hz
3. Every hot object emits (NTSE Rajasthan, Stage-I, 2013-14)
Infrared rays
Visible rays
X-rays
Ultraviolet rays
4. The spectrum which represents simple harmonic motion is (NTSE Karnataka Stage-I, 2014-15)
Electronic spectrum
Vibration spectrum
Hydrogen spectrum
Continuous spectrum
5. If angle of minimum deviation through an equilateral prism is 40°, angle of incidence (being equal to angle of emergence) would be (NTSE Chandigarh, Stage-I, 2014-15)
500
600
400
None of These
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