Exams › NEET › Physics

Angular width, θ = Y/D. For central maxima n = 1, hence, with increase in speed of electrons angular width of central maximum decreases.

1. λ/d ↑ θ ↓
2. λ/d ↓ θ ↑
3. λ/d ↑ θ ↑
4. λ/d ↓ θ ↓

Correct answer: λ/d ↓ θ ↓

Solution

The angular width θ is directly proportional to the wavelength λ and inversely proportional to the slit width d. If λ/d decreases, θ also decreases, which matches option D.

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 →