A. 5000 nm
B. 5000A
C. 500m
D. 2000um
Related Mcqs:
- Michelson calculated the speed of light using the instruments______________?
A. spectrometer
B. galvanometer
C. interferometer
D. none of these - In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?
A. Becomes double
B. Remains same
C. Becomes half
D. First increases then decrease because of the curvilinear graph - Diffraction fringes are____________________?
A. equally spaced
B. distance between them increases
C. distance between then decreases
D. they are adjacent with no space in between - Michelson devised the formula to calculate the speed of light_______________?
A. C = 4fd
B. C = 8fd
C. C = 16fd
D. C = 5/2fd - Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
A. Newton
B. Einstein
C. Michelson
D. Galileo - Which experiment shows that wavelength of light is smaller than that of sound___________________?
A. Diffraction
B. Polarization
C. Interference
D. Reflection - A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?
A. λ
B. Speed of sound
C. Speed of lightB.
D. h - The distance between any two consecutive nodes or antinodes in a stationary wavelength (λ) is _________?
A. λ
B. λ/2
C. λ/4
D. λ/8Submitted by: Rizwan Ayub Saadi
- In double slit experiment we observe _____________________?
A. interference fringes only
B. diffraction fringes only
C. both interference and diffraction fringes
D. polirized frringes - If a photon is reflected from the mirror then the change in momentum of each photon is_______________?
A. Zero
B. Double
C. Half
D. 1
