1.
Speed of light is maximum in?
2.
Which quantity is independent of the medium when an electromagnetic wave passes from one medium to another?
3.
The unit of frequency is?
4.
The peak wavelength of blackbody radiation shifts with temperature according to Wien’s law: λmax ∝ 1/T. If T doubles, λmax becomes:
5.
Which is NOT a result of quantized energy levels in atoms?
6.
If wavelength increases while velocity remains constant, what happens to frequency?
7.
For a photon with frequency 6 × 10^14 s^−1, what is its approximate energy in eV? (h = 6.63×10^−34 J·s, 1 eV = 1.602×10^−19 J)
8.
If frequency of a wave is doubled, wavelength becomes?
9.
If amplitude of an EM wave doubles, intensity changes by what factor?
10.
Which statement best explains why electromagnetic waves do not require a medium?
11.
Threshold frequency ν0 of a metal depends on:
12.
The distance between two successive crests is?
13.
In EM waves, energy travels due to?
14.
A wave with longer wavelength carries?
15.
Wave number (̄ν) is defined as reciprocal of wavelength. If λ = 500 nm, what is wave number in cm^−1?
16.
Which wave property is independent of medium?
17.
If photon flux doubles while photon energy stays same (ν fixed), what changes?
18.
Which region of EM spectrum corresponds to wavelengths around 10^−10 m?
19.
Propagation of EM waves was explained by?
20.
A metal has work function φ. If incident light has frequency ν such that hν = φ, what is the kinetic energy of emitted electrons?
21.
Which statement is true about Planck’s constant h?
22.
For a given photon, if its frequency is doubled, its momentum becomes:
23.
Which particle-like property of light explains the photoelectric effect?
24.
Which electromagnetic radiation has smallest wavelength listed?
25.
Which region of EM spectrum has highest frequency?
26.
Which formula correctly relates photon momentum p to wavelength λ?
27.
If c = 3.00×10^8 m/s and ν = 5.00×10^14 s^−1, what is λ in nm?
28.
What determines color of visible light?
29.
Radiation with maximum penetration power is?
30.
Which of the following changes will increase maximum kinetic energy of photoelectrons?
31.
In photoelectric effect, which observation contradicted classical wave theory?
32.
If amplitude doubles, intensity becomes?
33.
EM waves transport energy by?
34.
When EM waves travel from air to water?
35.
Which of the following will increase number of emitted electrons in photoelectric experiment (assuming ν > ν0)?
36.
According to Planck, energy of oscillator is quantized as E = nhν. Which of the following is true?
37.
For a photoelectron with K.E. = 1.2 eV, what is its speed (electron mass m = 9.11×10^−31 kg)? (1 eV = 1.602×10^−19 J)
38.
Wave number 20000 cm^−1 corresponds to wavelength:
39.
What happens to energy of EM radiation when frequency increases?
40.
If frequency is 5 × 10^14 Hz, what is wave nature?
41.
Why are electric and magnetic fields perpendicular in EM waves?
42.
In the Einstein photoelectric equation K.E. = hν − φ, what is the meaning of φ?
43.
A photon of wavelength 400 nm strikes a metal with work function 2.5 eV. Photon energy in eV is (use hc = 1240 eV·nm):
44.
If the energy of a photon is E, which expression gives its wavelength?
45.
A wave has amplitude ‘a’. What does amplitude represent?
