Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Where can we see an image formed the lens of an object?
On the object itself
On the lens itself
On the same side of the object
On the opposite side of the object
Principal focus is represented by
R
f
P
F
What is a magnifying glass used for?
Read large prints
Read small prints
To diverge rays
As a diverging lens
Which of the following is not true for a convex lens image?
Erect
Real
Can't be caught on screen
Magnified
Sunlight that bounces off a surface is said to be __________ from the surface.
Radiated
Absorbed
Emitted
Reflected
Which mirror is to be used to obtain a parallel beam of light from a point source?
Plane mirror
Concave mirror
convex mirror
None of these.
If a light ray is moving through two mediums with different refractive indices, which of the factors remains constant?
Wave length
Frequency
Speed
Both a and b
Which tool can be used to separate white light into different colors?
mirror
camera
prism
hammer
"Refraction" of light occurs when
light bounces off a surface.
light bends around corners or obstacles.
light changes direction due to a change in speed.
light waves add together to make a new wave with larger amplitude.
"Diffraction" of light occurs when
light changes intensity when passing from one material into another.
light waves add together to make a wave with larger amplitude.
