Nature of Electromagnetic Radiation
What are 3 characteristics of electromagnetic waves?
Calculate (a) wavenumber and (b) frequency of yellow radiation having wavelength 5800 ˚A.
1.724×1012cm−1 and 5.172×104s−1
1.724×1012cm−1 and 5.172×102s−1
1.724×104 cm−1 and 5.172×1012s−1
1.724×104cm−1 and 5.172×1014s−1
Yellow light emitted from a sodium lamp has a wavelength (λ) of 580 nm. Calculate the frequency (ν) and wave number ( ¯V ) of the yellow light.
What are the 4 main properties of electromagnetic waves?
- Radio waves > Microwaves > UV rays > X-rays
- X-rays > UV rays > Microwaves > Radio waves
- Radio waves > Microwaves > X-rays > UV rays
- UV rays > X-rays > Radio waves > Microwaves
Calculate the wavelength, frequency and wave number of a light wave whose period is 2.0 × 10–10 s.
What is Zeeman effect?
The ionization energy of hydrogen atom is -13.6 eV. The energy required to excite the electron in a hydrogen atom from the ground state to the first excited state is: (Avogadro's constant =6.022 × 1023)
1.69 × 10-20 J
1.69 ×10 25 J
1.69 × 10-23 J
1.69 ×10 23 J
A galaxy is moving away from the earth at a speed of . The shift in the wavelength of a redline at is . The value of , to the nearest integer, is [Take the value of speed of light, ]
A gas absorbs a photon of 355 nm and emits two wavelengths. If one of the emission is at 680 nm, the other is at:
Arrange the following type of radiations in increasing order of frequency: (a) radiation from microwave oven (b) amber light from traffic signal (c) radiation from FM radio (d) cosmic rays from outer space and (e) X-rays.
What are some uses for microwave radiation?
h=6.626×10−34 Js;velocity of light =3×108 ms−1
An electron and proton possess same K.E., how will their momentum be related?
The speed of electromagnetic waves in air is
- 3990.2 kJ mol−1
- 6790.2 kJ mol−1
- 158.7 m
- 100.5 m
- 135.9 m
- 88.2 m
A 100 Watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.
4 × 1020 s−1
2 × 1020 s−1
8 × 1020 s−1
1× 1020 s−1
Statement - 2: Frequency is defined as number of waves that pass a given point in one second.
Statement - 3: The maximum displacement shown by a point on a wave measured from its equivalent position is called wave number.
- All above
- Nature of particle
- Kinetic energy of particle
- Mass of particle
- "Ejection of photoelectron from a metal surface"
- "K-electron capture"
- "Splitting of spectral lines in electric field"
- Splitting of spectral lines in magnetic field
Two points on a traveling wave having a frequency and velocity are out of phase, then the minimum distance between the two points is