Question
Two vertical parallel mirrors $A$ and $B$ are separated by $10\,cm$. A point object $O$ is placed at a distance of $2\,cm$ from mirror $A$. The distance of the second nearest image behind mirror A from the mirror $A$ is $.........\,cm$

Answer

The desired image is $18\,cm$ from $A.$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An object of mass $500\; \mathrm{g}$, intitally at rest acted upon by a variable force where $\mathrm{X}$ component varies with $\mathrm{X}$ in the manner shown. The velocities of the object at point $X=8 \;\mathrm{m}$ and $X=12\; \mathrm{m},$ would be the respective values
An unpolarized light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the analyzer is measured as $100$ Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by $30^{\circ}$ in clockwise direction, the intensity of emerging light will be .......... Lumens.
In kinetic theory of gases, which of the following statements regarding elastic collisions of the molecules is wrong
Two identical non-conducting solid spheres of same mass and charge are suspended in air from a common point by two non-conducting, massless strings of same length. At equilibrium, the angle between the strings is $\alpha$. The spheres are now immersed in a dielectric liquid of density $800 kg m ^{-3}$ and dielectric constant $21$ . If the angle between the strings remains the same after the immersion, then

$(A)$ electric force between the spheres remains unchanged

$(B)$ electric force between the spheres reduces

$(C)$ mass density of the spheres is $840 kg m ^{-3}$

$(D)$ the tension in the strings holding the spheres remains unchanged

If the K.E. of a particle is doubled, then its momentum will
The velocity of certain ions that pass undeflected through crossed electric field $E = 7.7\,k\,V /m$ and magnetic field $B = 0.14\,T$ is.....$km/s$
Current $'i'$ is flowing in the rectangular loop placed in the $xyz$ plane as shown in the figure. Find the magnetic moment of the loop
Which of the following ray diagram show physically possible refraction
A carrier wave $v_{c}(t)=160 \sin \left(2 \pi \times 10^{6} t\right)$ $volts$ is made to vary between $V_{\max }=200\, {V}$ and $V_{\min }=$ $120\, {V}$ by a message signal ${V}_{{m}}({t})={A}_{{m}} \sin \left(2 \pi \times 10^{3} {t}\right)$ $volts.$ The peak voltage ${A}_{{m}}$ of the modulating signal is ..... .
If a particle moves in a circle describing equal angles in equal times, its velocity vector