i and ii
iii and iv
i and ii
ii and iv
Correct answer is D
No explanation has been provided for this answer.
Dispersion of light by a glass prism is due to the
different colours of the glass
different speeds of the various colours in glass
defects in the glass
high density of glass
Correct answer is B
No explanation has been provided for this answer.
When a yellow card is observed through a blue glass, the card would appear.
black
green
red
white
Correct answer is A
No explanation has been provided for this answer.
convex, 20cm
concave, 20cm
convex, 33cm
concave, 33cm
Correct answer is D
No explanation has been provided for this answer.
The plane mirrors in a kaleidoscope are usually placed
at an angle of 60o
parallel to one another
perpendicular to one another
at an angle of 45o
Correct answer is A
No explanation has been provided for this answer.