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
The optical glass used in the construction of spectacles is made by
Flint glass
Crookes glass
Quartz glass
Hard glass
Total internal reflection (TIR) is possible only when the light ray is passing through a_______.
Rarer to denser medium
Denser to rarer medium
Same medium throughout
Not possible at all
Consider the following statement:
Total internal reflection explains:
1) Formation of mirage in desert.
2) Formation of image in microscope.
3) Colour of evening sky.
4) Operation of optical fibres.
Which of the statement given above are correct?
1 and 4
3 and 4
2 and 3
1 and 2
Which of the following shows it’s operating Principle as Total internal reflection?
1) Optical fibres
2) Optical fingerprinting devices
3) Prisms in binoculars
4) Automotive rain sensors
Select the correct answer using the codes below.
1 and 2 only
1 and 3 only
2 and 4 only
1, 2, 3 and 4
If T is the time period of an oscillating pendulum, which one of the following statements is NOT correct?
The motion repeats after time T only once
T is the least time after which motion repeats itself
The motion repeats itself after nT, where n is a positive integer
T remains the same only for small angular displacements
