(A) Focal length and power both becomes infinitive
(B) Focal length and power both becomes zero
(C) Focal length becomes infinitive and power becomes zero
(D) None of the above
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
If 2 plane mirrors facing each other are inclined at an angle of 30 degree with each other. Then number of images formed by an object lying between them is?
(A) 10
(B) 11
(C) 12
(D) 13
What should be the minimum length of a plane mirror in which a person can see his/her full image?
(A) One third of the height of the person
(B) Equal to the height of the person
(C) Half of the height of the person
(D) One fourth of the height of the person
A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an?
(A) Infrasonic wave
(B) Audible wave
(C) Microwave
(D) Ultrasonic wave
Stationary wave is formed by?
(A) A transverse wave superposing a longitudinal wave
(B) Two waves of same speed superposing
(C) Two waves of the same frequency travelling in the opposite direction
(D) None of the above
Hyper-metropia or long sightedness can be corrected by using?
(A) Concave lenses
(B) Convex lenses
(C) Cylindrical lenses
(D) Bifocal lenses
Optical fibers are based on the phenomenon of?
(A) Dispersion
(B) Diffraction
(C) Interference
(D) Total internal reflection
A mirage occurs because of?
(A) Interference of light
(B) Diffraction of light
(C) Reflection by hot ground
(D) Total internal reflection by layers of air