Download App

Wave Optics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
Question
A microscope is used with sodium light and its resolving power is not sufficiently large. Higher resolution will be obtained by using wavelength of:
✓

Answer

  1. 400$\mathring{\text{A}}$
Explanation:
Since power of resolution is more for violet than for red, we conclude that resolving power is greater for light with lower wavelengths.
Wavelength of sodium light is around 589nm.
Hence resolving power increases for light with lower wavelength.

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 Wave Optics→Wave Optics — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

A long straight wire carrying current of $30 A$ is placed in an external uniform magnetic field of induction $4 \times 10^{-4} \mathrm{~T}$. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point $2.0 \ cm$ away from the wire is
→
A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black:
  1. The image will be shifted downward.
  2. The image will be shifted upward.
  3. The image will not be shifted.
  4. The intensity of the image will decrease.
→
Which of the following has zero average value in a plane electromagnetic wave?
→
A wire of resistance R is divided in 10 equal parts. These parts are connected in parallel, the equivalent resistance of such connection will be (a) 0.01 R(b) 0.1 R(c) 10 R   (d) 100 R
       
→
Ultraviolet rays coming from sun are absorbed by:
→
By a cell a current of 0.9 A flows through 2 ohm resistor and 0.3 A through 7 ohm resistor. The internal resistance of the cell is (a) 0.5 Ω(b) 1.0 Ω  (c) 1.2 Ω (d) 2.0 Ω
       
→
Time period of oscillation of a magnetic needle is
→
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
→
A particle of mass m and charge q enters a magnetic field B perpendicularly with a velocity v. The radius of the circular path described by it will be:
→
Direction of induced current is determined by :
→