MDCAT Physics Chapter 7 MCQ Test With Answer for (Light )

If the cover of a red book is observed in monochromatic blue light,It will appear

• White A
• Red B
• Black C
• Blue D

At the point of contact of the lens and the glass plate, the incident and reflected rays interfere

• constructively A
• destructively B
• either of them C
• none of them D

For incident angles equal or greater than the critical angle the glass air boundary will act as a

• Convex mirror A
• Concave mirror B
• Mirror C
• None if them D

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

• Refraction A
• Reflection B
• Diffraction C
• Formation of spectrum D

Two wave of intensities I an 4I superpose then the maximum and minimum intensities are

• 5I and 3I A
• 9I and I B
• 9I and 3I C
• 5I and I D

The distance between the concentric wavefronts is

• half wavelength A
• one wavelength B
• one and a half wavelength C
• none of them D

When the object is closer to eye or near point, the image becomes

• Sharp A
• Clear visible B
• Blurred C
• None of these D

A convex lens is dipped in a liquid whose refractive index is equal to the material of the lens. Then its focal length will become

• Infinite A
• Zero B
• Extremely small C
• Extremely large D

When a ray of light enters a denser medium from a rarer medium,its:

• Wavelength increases A
• Velocity increases B
• Frequency decreases C
• Wavelength decreases D

Newton's rings are formed due to

• Refraction of light A
• Diffraction of light B
• Interference of light C
• None of these D

The brilliance of diamond is

• Entirely due to refractive index A
• Entirely due to total internal reflection B
• Partly due to total internal reflection C
• None of the above D

• 
  A
• 
  B
• 
  C
• 
  D

The resolving power of human eye is

• 1°  A
• 2° B
• 3° C
• 6° D

Consider telecommunication through optical fibers.Which of the following statements is not true?

• Optical fibers may have homogeneous core with a suitable cladding A
• Optical fibers can be of graded refractive index B
• Optical fibers are subject to electromagnetic interference from outside C
• Optical fibers have extremely low transmission loss D

If f = 5 cm and d = 25 cm then the magnification will be

• 2 A
• 4 B
• 5 C
• 6 D

When monochromatic light is incident, making certain angle, on a thin parallel film, the interference fringes formed are

• straight A
• circular B
• square C
• plane D

The light produced by a laser is all the following except

• Incoherent A
• Monochromatic B
• In the form of a narrow beam C
• Electromagnetic D

Which of the following theories of light are explained by the Young's double slit experiment?

• wave theory of light A
• particle nature of light B
• dual nature of light C
• corpuscular nature of light D

The interference fringes are of

• equal width A
• variable width B
• zero width C
• non-uniform width D

To get high resolving power for a telescope one should use

• Objective of large aperture A
• Objective of large focal length B
• Eye piece of large focal length C
• Eye piece of small focal length D