Question
For which frequency of light, the human eye is most sensitive?
✓
Answer
Human eye is sensitive to light of wavelength $➔ \lambda = 5550$ angstrom.
So its frequency is $\text{v}=\frac{\text{c}}{\lambda}$
$\text{v} =\frac{5550}{3 \times 10^8} \times 10^{-10}$
$v = 5.405 \times 10^{14} Hz$
So its frequency is $\text{v}=\frac{\text{c}}{\lambda}$
$\text{v} =\frac{5550}{3 \times 10^8} \times 10^{-10}$
$v = 5.405 \times 10^{14} Hz$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A $60$ watt bulb is hung over the center of a table $4 m \times 4 m$ at a height of $3 m$. The ratio of the intensities of illumination at a point on the centre of the edge and on the corner of the table is
→Three capacitors of capacitances $6\mu\text{F}$ each are available. The minimum and maximum capacitances, which may be obtained are:
→The capacitance of a parallel plate condenser does not depend on(a) Area of the plates(b) Medium between the plates(c) Distance between the plates(d) Metal of the plates
A short magnet oscillates with a time period 0.1 s at a place where horizontal magnetic field is 24μT. A downward current of 18 A is established in a vertical wire 20 cm east of the magnet. The new time period of oscillator(a) 0.1 s(b) 0.089 s(c) 0.076 s(d) 0.057 s
In metals ____ are the mobile charges.
If $\int_\text{S}\text{E.dS}=0$ over a surface, then:
→Kirchhoff's second law in any closed circuit represents:
A photon will have less energy, if its:
To charges $q_1$ and $q_2$ are placed $30 \ cm$ apart, shown in the figure. A third charge $q_3$ is moved along the arc of a circle of radius $40 \ cm$ from $C$ to $D$. The change in the potential energy of the system is $\frac{ q _{ s }}{4 \pi \varepsilon_0} k$, where $k$ is
→Emf is most closely related to(a) Mechanical force(b) Potential difference(c) Electric field(d) Magnetic field