Three of the fundamental constants of physics are the
universal gravitational constant, \( \math.... VIDEO
Three of the fundamental constants of physics are the
\( \mathrm{P} \)
universal gravitational constant, \( \mathrm{G}=6.7 \times 10^{-11} \mathrm{~m}^{3} \mathrm{~kg}^{-1} \mathrm{~s}^{-2} \),
W
the speed of light, \( \mathrm{c}=3.0 \times 10^{8} \mathrm{~m} / \mathrm{s} \), and planck's constant, \( \mathrm{h}=6.6 \times 10^{-34} \mathrm{~kg} \mathrm{~m}^{2} \mathrm{~s}^{-1} \).
The energy of a photon is given by \( \mathrm{E}=\frac{\mathrm{hc}}{\lambda} \).
If \( \lambda=4 \times 10^{-7} \mathrm{~m} \), the energy of photon is
(A) \( 3.0 \mathrm{eV} \)
(B) \( 4.5 \mathrm{eV} \)
(C) \( 2.10 \mathrm{eV} \)
(D) \( 3.95 \mathrm{eV} \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
Other Videos By PW Solutions 2024-01-21 In an experiment to determine the acceleration due to gravity \( g \), the formula used for the .... 2024-01-21 What displacement must be added to the
displacement \( 25 \hat{i}-6 \hat{j} m \) to give a displ.... 2024-01-21 Angle between \( (\overrightarrow{\mathrm{P}}+\overrightarrow{\mathrm{Q}}) \) and \( (\overright.... 2024-01-21 Which of the sets given below may represent the
magnitudes of three vectors adding to zero ?.... 2024-01-21 The three vectors \( \mathrm{OA}, \mathrm{OB} \) and \( \mathrm{OC} \) have the same
magnitude \.... 2024-01-21 Statement-1: The time period of a pendulum is given by formula, \( \mathrm{T}=2 \pi \sqrt{\mathr.... 2024-01-21 Two forces, \( F_{1} \) and \( F_{2} \) are acting on a body. One
force is double that of the ot.... 2024-01-21 If the angle between vector \( \vec{a} \) and \( \vec{b} \) is an acute
angle, then the differen.... 2024-01-21 Two forces of 4 dyne and 3 dyne act upon a body. The
resultant force on the body can only be -.... 2024-01-21 Three of the fundamental constants of physics are the
universal gravitational constant, \( \math.... 2024-01-21 Three of the fundamental constants of physics are the
universal gravitational constant, \( \math.... 2024-01-21 The percentage errors in the measurement of \( m \) and
speed are \( 2 \% \) and \( 3 \% \) resp.... 2024-01-21 Three of the fundamental constants of physics are the universal gravitational constant, \( \math.... 2024-01-21 A book with many printing errors contains four
different expressions for the displacement \( y \.... 2024-01-21 The least count of a meter scale is \( 1 \mathrm{~mm} \). Which of
following lengths is/are meas.... 2024-01-21 When the gap is closed without placing any object
in the screw gauge whose least count is \( 0.0.... 2024-01-21 The pitch of a screw gauge is \( 1 \mathrm{~mm} \) and there are
50 divisions on its circular sc.... 2024-01-21 A force \( \mathrm{F} \) is given by \( \mathrm{F}=\mathrm{at}+\mathrm{bt}^{2} \), where \( \mat.... 2024-01-21 If the speed of light (c), acceleration due to gravity
(g) and pressure (p) are taken as fundame.... 2024-01-21 To estimate ' \( \mathrm{g} \) ' (from \( \left.g=4 \pi^{2} \frac{L}{T^{2}}\right) \), error in
.... 2024-01-21 You may not know integration. But using
dimensional analysis you can check or prove
results. In ....