WorksheetsOnline Class Test 4
Total questions: 10
Worksheet time: 5mins
In which medium Refractive index is less
n1
n2
n1 =n2
Velocity of light in n1 medium is 2 x 10^ 8 m/s. and vlocity of light in medium n2 is 1.5 x 10 ^8 m/s.
n12 is ( refractive index of 1 with respect to 2 )
0.75
1.33
0.75 x 10^ 8
1.33 x 10 ^8
An image of size twice as that of object is formed ,when place in front of concave mirror. Where should an obeject be place to form real image.
Object be placed away from centre of curvature with respect to mirror
Object is placed between centre of curvature and principal focus.
Object be place between pole and principal focus
Object is place at center of curvature
Refractive imdex is
Ratio of speed of light in vacuum and speed of light in a medium.
Refrative index is inversly proportional to veloctity of light in a medium.
Refrative index measure optical density of the medium.
All of above
Which of following statement is incorrect regarding image formation.
A ray of light parallel to the principle axis passes or appears to pass through principal focus.
A ray of light passes through or appears to pass through principal focus then refrlected ray will become parallel to principal axis.
A ray of light passes through or appears to pass through centre of curvature then reflected ray will retrace its path
A ray of light passes through or appears to pass through pole then reflected ray retraces its path.
Magnification
Is ratio of height of image to height of object
Is ratio of image distance to object distance
can be positive or can be negative
All of above
Magnification is -4 .what are the different conclusions in cas e of mirror
Image is real
Magnified image is formed
Image is formed on same side of object.
All of above
Magnification is +1 .what are conclusions we can draw from it
Images virtual and erect
Images formed of same height.
Is formed on the opposite side of object with respect to mirror.
All of above.
Sign conventions for the mirror is/are
All the distances are measured from the pole of the mirro.
All the distances in the direction of incidence are taken as positive and all the distances in the opposite direction to the direction of incidence are taken as negative.
All the distances apurva to the principal axis are taken as positive and all the distances downward to the principal axis are taken as negative.
All of above
The angle of incidence is 30 degree and the angle of refraction is 40 degree. So so what we can conclude from above statement
Light moves from rarer medium to denser medium
Light moves from denser medium to rarer medium
Cannot be determined from the above statement.
None of these
