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Physics 914 MCQs [All-Courses]

Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas.

In double slit experiment if one of the two slit is covered then________________?

A no interference fringes are observed

B no diffraction fringes are observed

C no fringes observed

D interference pattern not disturbed

Review Detailed Answer

Correct Answer: no interference fringes are observed

In monochromatic red light a blue book will probably appear to be_________________?

A black

B purple

C green

D no scientific reasoning available

Review Detailed Answer

Correct Answer: black

Which one of the following cannot be polarized ?

A radio waves

B ultraviolot rays

C X-rays

D sound waves

Review Detailed Answer

Correct Answer: sound waves

In a plane polarized light _________________?

A vibration in all direction

B vibration in two mutually perpendicular directions

C vibration take place in a direction perpendicular to the direction of propagation of light

D no vibration at all

Review Detailed Answer

Correct Answer: vibration take place in a direction perpendicular to the direction of propagation of light

Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?

A 4 x 10-10 m

B 2 x 10-10 m

C 0.02×10-10m

D 20×10-10m

Review Detailed Answer

Correct Answer: 2 x 10-10 m

When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?

A 5000 nm

B 5000A

C 500m

D 2000um

Review Detailed Answer

Correct Answer: 5000A

The blue colour of the sky is due to___________________?

A diffraction

B reflection

C polarization

D scattering

Review Detailed Answer

Correct Answer: scattering

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

Review Detailed Answer

Correct Answer: both dark and bright fringes are of equal width

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

Review Detailed Answer

Correct Answer: coloured fringes will be seen

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

Review Detailed Answer

Correct Answer: destructive interference

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Physics 914 MCQs [All-Courses]

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All Topics 914

In double slit experiment if one of the two slit is covered then________________?

In monochromatic red light a blue book will probably appear to be_________________?

Which one of the following cannot be polarized ?

In a plane polarized light _________________?

Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?

When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?

The blue colour of the sky is due to___________________?

In an interference pattern______________________?

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

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