Exams › NEET › Physics

For first minimum, sin θ = nλ/a = 5000×10⁻¹⁰ / 0.001×10⁻³ = 0.5. θ = 30°.

1. θ = 15°
2. θ = 30°
3. θ = 45°
4. θ = 60°

Correct answer: θ = 30°

Solution

The given calculation shows that sin θ = 0.5, which corresponds to θ = 30°. This matches option B.

Related NEET Physics questions

• Ray optics is valid when characteristic dimension are
• In Young's experiment with white light, the central fringe is white. If now a transparent film is introduced in the upper beam coming from the top slit, then the white fringe:
• A: Coloured spectrum is seen when we look through a cloth R: Diffraction of light takes place when light is travelling through the pores of cloth
• A microscope is used with sodium light and its resolving power is not sufficiently large.Higher resolution will be obtained by using wavelength of
• Assertion Assertion: When a light wave travels from a rarer to a denser medium, its speed decreases. The decrease in speed imply a reduction in energy carried by the light wave. Reason Reason: The energy of a wave is inversely proportional to velocity of wave
• When light travels from one medium into another it suffers

⚔️ Practice NEET Physics free + battle 1v1 →