A. waves
B. particles
C. photons
D. it was not his discovery
Related Mcqs:
- According to Einstein, the gravitational interaction is possible between_______________?
A. material objects only
B. material objects and electromagnetic radiation only
C. electromagnetic radiations
D. none of the above - Einstein’s photoelectric equation is given by_______________?
A. 1/2 mvmax2=hf+Φ
B. 1/2 mvmax2-hf = Φ
C. 1/2 mvmax2=hf-Φ
D. All of above are correct - The synopsis of Einstein’s equation E = mc² is that
A. The faster you move, the lighter you get
B. The faster you move, the heavier you get
C. The slower you move, the heavier you get
D. None of the aboveSubmitted by: Rizwan Ayub Saadi
- 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 - An object travels at constant speed around a circle of radius 1.0 m in 2.0 seconds. What is the magnitude of its acceleration?
A. 0
B. π2
C. 2 π2
D. 4 π2Submitted by: Tauseef Ali
- When light incident normally on thin film the path difference depends upon ________________?
A. thickness of the film only
B. nature of the film only
C. angle of indidence only
D. all thickness nature and angle of incidence - Light reaches the earth form sun in nearly____________________?
A. 15 minutes
B. 10 minutes
C. 8 minutes
D. 8 minutes 30 seconds - A light ray traveling form rarer to denser medium suffers a phase change of__________________?
A. 60°
B. 90°
C. 180°
D. 45° - If a material object moves with speed of light its mass becomes ________________?
A. equal to its rest mass
B. double of its rest mass
C. infinite
D. zero - Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
A. Newton
B. Einstein
C. Michelson
D. Galileo
