Question
For a glass prism, the angle of minimum deviation will be smallest for the light of:
✓
Answer
- Red colour.
When a ray of light passes through a prism, it disperses the ray of light into seven colours. They are - Violet, Indigo, Blue, Green, Yellow, Orange, Red i.e., VIBGYOR.
The angle of deviation increases in order.
It means that Violet bends the most and Red the least. The extent of bending depends on their wavelength. Red has larger wavelength than blue.
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 silver voltameter of resistance 2 ohm and a 3 ohm resistor are connected in series across a cell. If a resistance of 2 ohm is connected in parallel with the voltameter, then the rate of deposition of silver(a) Decreases by 25%(b) Increases by 25%(c) Increases by 37.5%(d) Decreases by 37.5%
The X-ray beam emerging from an X-ray tube:
- Is monochromatic.
- Has all wavelengths smaller than a certain maximum wavelength.
- Has all wavelengths greater than a certain minimum wavelength.
- Has all wavelengths lying between a minimum and a maximum wavelength.
The number of revolutions per second made by an electron in the first Bohr orbit of hydrogen atom is of the order of $3$
→A square metallic wire loop of side $0.1 m$ and resistance of $1 \Omega$ is moved with a constant velocity in a magnetic field of $2 \ \mathrm{wb} / \mathrm{m}^2$ as shown in figure. The magnetic field is perpendicular to the plane of the loop, loop is connected to a network of resistances. What should be the velocity of loop so as to have a steady current of $1 \ mA$ in loop
→The spectrum of light emitted by a glowing solid is(a) Continuous spectrum(b) Line spectrum(c) Band spectrum(d) Absorption spectrum
Which conservation law is obeyed in Einstein's photoelectric equation?
A magnet of magnetic moment $2 \ \mathrm{JT}^{-1}$ is aligned in the direction of magnetic field of $0.1 T .$ What is the net work done to bring the magnet normal to the magnetic field
→An electric current passes through a long straight wire. At a distance $5 \ cm$ from the wire, The magnetic field is $B.$ The field at $20 \ cm$ from the wire would be
→While doing his experiment, Millikan one day observed the following charges on a single drop
$(i)\ 6.563 \times 10^{-19} \mathrm{C}$
$(ii)\ 8.204 \times 10^{-19} \mathrm{C}$
$(iii)\ 11.50 \times 10^{-19} \mathrm{C}$
$(iv)\ 13.13 \times 10^{-19} \mathrm{C}$
$(v)\ 16.48 \times 10^{-19} \mathrm{C}$
$(vi)\ 18.09\times 10^{-19} \mathrm{C}$
From this data the value of the elementary charge $(e)$ was found to be
→$(i)\ 6.563 \times 10^{-19} \mathrm{C}$
$(ii)\ 8.204 \times 10^{-19} \mathrm{C}$
$(iii)\ 11.50 \times 10^{-19} \mathrm{C}$
$(iv)\ 13.13 \times 10^{-19} \mathrm{C}$
$(v)\ 16.48 \times 10^{-19} \mathrm{C}$
$(vi)\ 18.09\times 10^{-19} \mathrm{C}$
From this data the value of the elementary charge $(e)$ was found to be
Which of the following cannot be polarized?