Download App

Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
MCQ
Finger prints are observed by the use of:
  • A
    Telescope
  • ✓
    Microscope
  • C
    Gallilean telescope
  • D
    Concave lens
✓

Answer

Correct option: B.
Microscope

Microscope is used for enlarging tiny objects or details which our eyes cannot detect. It is used to highly magnify the patterns and design of Finger prints and is widely used for Fingerprint tracing.

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

Explore more

More "M.C.Q (1 Marks)" from Ray Optics and Optical Instruments→Ray Optics and Optical Instruments — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A bi convex lens of focal length $10\,cm$ is cut in two identical parts along a plane perpendicular to the principal axis. The power of each lens after cut is $...........\,D$.
→
The storage battery of a car has an $emf$ of $12\; V$. If the internal resistance of the battery is $0.4\; \Omega,$ what is the maximum current (in $A$) that can be drawn from the battery?
→
In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain-drop after
→
To accommodate the view that matter is made up to $5$ elements only, a scientist proposed the following hypothesis; that atoms can have a maximum principal quantum number $n _{\operatorname{man}}$ and no higher. Then, which of the following statements must be true ?
→
A potentiometer wire is $100\,\, cm$ long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50\,\, cm$ and $10\,\, cm$ from the positive end of the wire in the two cases. The ratio of emf's is 
→
${ }_ {92} \mathrm{U}^{238} $ absorbs a neutron. The product emits an electron. This product further emits an electron. The result is
→
A bar magnet is held perpendicular to a uniform magnetic field. If the couple acting on the magnet is to be halved by rotating it, then the angle by which it is to be rotated is
→
Let $F_{p p} ,F_{p n}$ and $F_{n n}$ fill denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. When the separation is $1$ fm :
→
There are two metallic spheres of same radii but one is solid and the other is hollow, then
→
The magnetic flux through a circuit of resistance $R$ changes by an amount $\Delta \phi $ in time $\Delta t$, Then the total quantity of electric charge $Q$, which passing during this time through any point of the circuit is given by
→