Question # 1

Huygen's theory cannot explain

Choose an answer

Diffraction

Interference

Polarization

Photoelectric effect

The wave nature of light was proposed by:

Choose an answer

Newton

Thomas Young

Huygen

None of these

With age, least distance of distinct vision:

Choose an answer

Increases

Decreases

Is not affected

None is correct

Which one of the following can act approximately as a source of monochromatic light;

Choose an answer

Neon lamp

Fluorescent tube

Sodium lamp

None of these

The magnifier forms a virtual image of the object at:

Choose an answer

Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

Wave length of that color as compared to that of violet color is:

Choose an answer

Smaller

Longer

Equal

None of these

The magnifier forms a virtual image of the object at:

Choose an answer

Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

The image of the tip of a needle is never sharp because of

Choose an answer

Polarization of light

Interference of light

Diffraction of light

Reflection of light

The terms phase difference and path difference are:

Choose an answer

Same

Different

Equal

None of these

The size of the image is maximum when its distance from the magnifying glass is:

Choose an answer

0.10 m

0.15 m

0.20 m

0.25 m

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Choose an answer

Greater, smaller

Smaller, smaller

Smaller, larger

Greater, larger

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Choose an answer

6 x 10^-5rad

7 x 10^-5rad

8 x 10^-5rad

None of these

Huygen's principles states that:

Choose an answer

Light travels in straigth line

Light has dual nature

Either of these

None of these

Angle between the ray of light and the corresponding wavefront is:

Choose an answer

0°

60°

90°

120°

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Choose an answer

Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, infrared rays, micro waves

Visible light, gamma rays, radio waves

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Choose an answer

Refraction

Reflection

Diffraction

Formation of spectrum

More Classes

Other Links

ECAT Physics Chapter 9 Physical Optics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer