JEE Main 2021 (Online) 20th July Evening Shift | Ray & Wave Optics Question 100 | Physics

JEE Main 2021 (Online) 20th July Evening Shift

MCQ (Single Correct Answer)

-1

With what speed should a galaxy move outward with respect to earth so that the sodium-D line at wavelength 5890 $$\mathop A\limits^o $$ is observed at 5896 $$\mathop A\limits^o $$ ?

306 km/sec

322 km/sec

296 km/sec

336 km/sec

JEE Main 2021 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-1

Region I and II are separated by a spherical surface of radius 25 cm. An object is kept in region I at a distance of 40 cm from the surface. The distance of the image from the surface is :

JEE Main 2021 (Online) 20th July Morning Shift Physics - Ray & Wave Optics Question 102 English

JEE Main 2021 (Online) 20th July Morning Shift Physics - Ray & Wave Optics Question 102 English

55.44 cm

18.23 cm

9.52 cm

37.58 cm

JEE Main 2021 (Online) 18th March Evening Shift

MCQ (Single Correct Answer)

-1

Three rays of light, namely red (R), green (G) and blue (B) are incident on the face PQ of a right angled prism PQR as shown in the figure.

JEE Main 2021 (Online) 18th March Evening Shift Physics - Ray & Wave Optics Question 103 English

JEE Main 2021 (Online) 18th March Evening Shift Physics - Ray & Wave Optics Question 103 English

The refractive indices of the material of the prism for red, green and blue wavelength are 1.27, 1.42 and 1.49 respectively. The colour of the ray(s) emerging out of the face PR is :

green

blue and green

blue

red

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

-1

In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The distance between the first and the third bright fringe formed when the slits are illuminated by a mnochromatic light of 5890 $$\mathop A\limits^o $$ is :-

1178 $$\times$$ 10^$$-$$9 m

1178 $$\times$$ 10^$$-$$6 m

1178 $$\times$$ 10^$$-$$12 m

5890 $$\times$$ 10^$$-$$7 m

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