A beam of light consisting of red, green and blue colours is incifent on a right angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively.
The prism will
A
not separate the three colours at all
B
separate the red colour part from the green and blue colours
C
separate the blue colour part from the red and green colours
D
separate all the three colours from one another
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
In an astronomical telescope in normal adjustment a straight black line of length L is drawn on inside part of objective lens. The eye-piece forms a real image of this line. The length of this image is $$I$$. The magnification of the telescope is
A
$${{L + I} \over {L - I}}$$
B
$${L \over I}$$
C
$${L \over I} + 1$$
D
$${L \over I} - 1$$
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the interference pattern, $${{{I_{max}}} \over {{I_{min}}}}$$ is
A
$${{49} \over {121}}$$
B
$${4 \over 9}$$
C
$${9 \over 4}$$
D
$${{121} \over {49}}$$
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Light of wavelength 500 nm is incifent on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted electron is