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

00:00
Question # 1

Speed of light in vacuum depends upon:

Question # 2

The locus of all points in a medium having same phase of vibration is called

Question # 3

The magnifier forms a virtual image of the object at:

Question # 4

For the virtual image, option _______ is not correct:

Question # 5

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

Question # 6

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

Question # 7

Huygen principle is used to determine:

Question # 8

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

Question # 9

Wave length of light, on the average, is given by:

Question # 10

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

Question # 11

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 12

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

Question # 13

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 14

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

Question # 15

Light appears to travel in straight line because

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
2 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
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 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
5 Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
6 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
7 If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
8 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
9 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
10 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these

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