Academictask provides MCQs of Physics from Basic to Advance, so that you can prepare accordingly. Physics Mcqs section is useful for both students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test, BPSC Test, other competitive and entry test preparations. Here you will find physics MCQs and answers with detailed explanations. MCQs of Physics include basic physics MCQs, Measurements MCQs, Vectors And Equilibrium MCQs, Work and Energy MCQs, Motion and Force MCQs, Circular Motion MCQs, Fluid Dynamics MCQs, Waves MCQs, Heat and Thermodynamics MCQs, Current Electricity MCQs, Electrostatics MCQs, Electromagnetism MCQs, Electromagnetic Induction MCQs, Alternating Current MCQs, Nuclear Physics MCQs, etc.

131. In double slit experiment we observe _____________________?

A. interference fringes only
B. diffraction fringes only
C. both interference and diffraction fringes
D. polirized frringes

132. Which one of the following properties of light does not change with the nature of the medium ?

A. velocity
B. wavelength
C. amplitude
D. frequency

133. Photoelectric effect was given by ____________________?

A. Hertz
B. Fresnel
C. Einstein
D. Plank

134. Longitudinal waves do not exhibit _____________________?

A. reflection
B. refraction
C. diffraction
D. polarization

135. A point source of light placed in a homogeneous medium gives rise to ___________________?

A. a cylindrical wave front
B. an elliptical wave front
C. a spherical wave front
D. a plane wave front

136. Which one of the following is nearly monochromatic light ?

A. light form fluorescent tube
B. light form neon lamp
C. light form sodium lamp
D. light form simple lamp

137. When crest of one wave falls over the trough of the other wave this phenomenon is known as________________?

A. polarization
B. constructive interference
C. destructive interference
D. diffraction

138. In Young double slit experiment, if white light is used____________________?

A. alternate dark and bright fringes will be seen
B. coloured fringes will be seen
C. no interference fringes will be seen
D. impossible to predict

139. In an interference pattern______________________?

A. bright fringes are wider than dark fringes
B. dark fringes are wider than bright fringe
C. both dark and bright fringes are of equal width
D. central fringes are brighter than the outer fringes

140. The blue colour of the sky is due to___________________?

A. diffraction
B. reflection
C. polarization
D. scattering