white light is an electromagnetic wave
the prism has all the colours of the white light
white light has undergone total internal reflection in the prism
different colours of white light travel with different speeds in glass
white ligth consist of yellow, green and red colours
Correct answer is D
No explanation has been provided for this answer.
41.8o
44.1o
60.0o
83.6o
120.0o
Correct answer is D
\(\frac{4}{3}\) = \(\frac{sin r_1}{sin 30}\) and \(\frac{4}{3}\) = \(\frac{sin r_2}{sin 30}\)
r1 = 41.8o and r2 = 41.8o
angle between them = r1 + r2
= 83.6o
i and iii only
i and ii only
ii and iii only
i, ii, and iii only
i only
Correct answer is B
No explanation has been provided for this answer.
A 45o triangular glass prism can be used as a reflector of light because
A refraction never takes place in such a prism
the angle of reflection equals the angle of incidence
the refractive index of glass is less than 1
it is transparent
the critival angle angle for glass is less than 45o
Correct answer is E
No explanation has been provided for this answer.
An object is placed 15cm in front of a concave mirror of radius 40cm. The image formed is
virtual and 60cm behind the mirror
real and 60cm behind the mirror
virtual and at infinity
real and at infinity
virtual and 40cm from the mirror
Correct answer is A
u = f