Physics Past Questions and Answers

The diagram above shows an incident ray A, inclined at angle of 50^o to the interface CB. The ray OB is found to lie along the surface. What is the refractive index of the medium X with respect to air?

A Sin50^o/sin40^o
B Sin40^osin50^o
C Sin90^o/sin50^o
D Sin40^o/sin90^o
E Sin90^o/sin40^o

Question 2337:

A Sin50^o/sin40^o
B Sin40^osin50^o
C Sin90^o/sin50^o
D Sin40^o/sin90^o
E Sin90^o/sin40^o

Question 2338:

The eye defect illustrated by the diagram above is

A Astigmatism
B Long sightedness
C Loss accommodation
D Short sightedness
E Colour blindness

Question 2339:

The eye defect illustrated by the diagram above is

A Astigmatism
B Long sightedness
C Loss accommodation
D Short sightedness
E Colour blindness

Question 2340:

A simple microscope forms an image twice the size of the object. If the focal length of the lens of the microscope is 20m, how far is the object from the lens?

A 10m
B 20m
C 30m
D 40m
E 60m