1 |
In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is. |
Real inverted
Virtual diminshed
Virtual inverted
Virtual erected
|
2 |
If a convex lens is used as a magnifying glass, whcih lens will give higher magnification that has. |
Short size
Long focal length
Large size
Short focal length
|
3 |
The focal length of convex lens |
Negative
Positive
small
Large
|
4 |
The magnifying power of a convex lens of focal lendth 10 cm is |
7
9.6
11
3.5
|
5 |
The magnification of a convex lens of focal length 5 cm is equal to. |
5
6
10
23
|
6 |
The units of magnifying power of microscope or telescope are. |
Metre
m<sup>-1</sup>
dioptre
No unit
|
7 |
The ability of reveal the minor details of an object under examination is called. |
Resolving power
Magnification
Scattering
Reflection
|
8 |
The least distance of distinct vision for the normal eye is. |
15 cm
25 cm
125 cm
25 m
|
9 |
Which is nooptically active |
Sugar
Tartaric acid
Water
Sodium chloride
|
10 |
Intensity of light depend on |
Wave length
Amplitude
Velocity
Frequency
|
11 |
Which one of the following can not be polarized. |
Ultra violet rays
Radio waves
T.V. Waves
Sound waves
|
12 |
The distinguish between transverse and longitudinal wave_______ is used. |
Refraction
Interference
Diffraction
polarization
|
13 |
The phenomenon of polarization of light reveals that sun light is |
Longitudinal waves
Transverse wave
Electromagnetic waves
Monochromatic wave
|
14 |
Which phenomenon of light proves that light waves are transverse in nature. |
Refraction
Reflection
Diffraction
Polarization
|
15 |
The process of confining the beam of light to vibrate in one plane is called. |
Interference
Diffraction
Polarization
Total internal refraction
|
16 |
Sound waves can not be |
Reflected
Refracted
Polarized
Diffracted
|
17 |
X-ray diffraction has been very useful in determining the structure of |
Hemoglobin
Stars
Galaxies
Stones
|