1
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
A point source of light, S is placed at distance L in front of the centre of plane mirror of width d which is hanging vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror, at a distance 2L as shown below. The distance over which the man can see the image of the light source in the mirror is

JEE Main 2019 (Online) 12th January Morning Slot Physics - Geometrical Optics Question 129 English
A
d
B
d/2
C
3d
D
2d
2
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
What is the position and nature of image formed by lens combination shown in figure ? (f1, f2 are focal lengths)

JEE Main 2019 (Online) 12th January Morning Slot Physics - Geometrical Optics Question 128 English
A
$${{20} \over 3}$$ cm from point B at right, real
B
70 cm from point B at right ; real
C
40 cm from point B at right; real
D
70 cm from point B at left ; virtual
3
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the material of the prism is $$\sqrt 3 $$, then the angle of incidence is:
A
60o
B
45o
C
90o
D
30o
4
JEE Main 2019 (Online) 11th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If the object moves away from the lens at a speed of 5 m/s, the speed and direction of the image will be :
A
1.16 $$ \times $$ 10–3 m/s towards the lens
B
2.26 $$ \times $$ 10–3 m/s away from the lens
C
3.22 × 10–3 m/s towards the lens
D
0.92 $$ \times $$ 10$$-$$3 m/s away from the lens
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