ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

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Question # 1

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 2

A grating with high resolving power can distinguish _______ difference in wavelengths :

Question # 3

In order to get interference using two light rays

Question # 4

For the virtual image, option _______ is not correct:

Question # 5

When the object lies between F and 2F, the image formed by is formed at:

Question # 6

Resolving power in mth order diffraction for grating is given by:

Question # 7

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 8

To see the minor details of the object by microscope, it should have:

Question # 9

A convex lens acts as diverging lens when the object is placed:

Question # 10

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

The appearance of the colour in the soap (oil) film results from:

Question # 13

A convex lens acts as diverging lens when the object is placed:

Question # 14

A prism splits a beam of white light into seven component colors. This is so because

Question # 15

A magnifier gives an image which is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
2 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
3 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
4 To observe interference of light, the condition, which must be met with is that the sources must be:
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
5 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
6 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
7 The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
A. Greater than
B. Less than
C. Equal to
D. None of these
8 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
9 With age, least distance of distinct vision:
A. Increases
B. Decreases
C. Is not affected
D. None is correct
10 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C

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