MCQ
The angular spread of central maximum, in the diffraction pattern, does not depend on ______.
  • A
    The distance between the slit and sources
  • B
    Width of slit
  • C
    Wavelength of light
  • D
    Frequency of light

Answer

  1. The distance between the slit and sources

Explanation:

Angular spread of central maxima $=(\theta)=\frac{\lambda}{\text{b}}​$

Where $\lambda$ = wavelength of light

b = width of slit

⇒ Clearly, it does depends on the distance between slit and sources.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Let $\overrightarrow{\text{E}}$ and $\overrightarrow{\text{B}}$ denote electric and magnetic fields in a frame S and $\overrightarrow{\text{E}}$ and $\overrightarrow{\text{B}}$ in another frame S moving with respect to S at a velocity $\overrightarrow{\text{v}}.$ Two of the following equations are wrong. Identify them.

  1. $\text{B}_\text{y},=\text{B}_\text{y}+\frac{\text{vE}_\text{z}}{\text{c}^2}$

  2. $\text{E}_\text{y},=\text{E}_\text{y}+\frac{\text{vB}_\text{z}}{\text{c}^2}$

  3. $\text{B}'_\text{y}=\text{B}_\text{y}+\text{v}\text{E}_\text{z}$

  4. $\text{E}'_\text{y}=\text{E}_\text{y}+\text{vB}_\text{z}$

The velocity of light emitted by a source S observed by an observer O, who is at rest with respect to S is c. If the observer moves towards S with velocity v, the velocity of light as observed will be

(a) c + v  

(b) c - v

(c) c  

(d)  

In the given circuit, with steady current, the potential drop across the capacitor must be

(a) V

(b) V / 2

(c) V / 3  

(d) 2V / 3

Calculate the wavelength of electromagnetic waves of frequency 300MHz.
An electron (mass m) with an initial velocity $\text{v}=\text{v}_0\hat{\text{i}}(\text{v}_0>0)$ is in an electric field $\text{E}=-\text{E}_0\hat{\text{i}}(\text{E}_0=\text{constant}>0)$. It’s de Broglie wavelength at time t is given by:

Consider a binary star system consisting of two stars of masses  and  separated by a distance of 30 AU with a period of revolution equal to 30 years. If one of the two stars is 5 times farther from the centre of mass than the other. The masses of the two stars in terms of solar masses are

(a) 5, 15  

(b) 25, 5

(c) 25, 10

(d) 7, 25

A particle moves in a closed orbit around the origin, due to a force which is directed towards the origin. The de Broglie wavelength of the particle varies cyclically between two values λ1, λ2 with λ> λ2. Whichof the following statement are true?

If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately

(a) 60%

(b) 65%

(c) 70%

(d) 75%

The energy in MeV is released due to transformation of 1 kg mass completely into energy (c = 3 

(a) 7.625 ×10 MeV

(b) 10.5  

(c) 2.8  

(d) 5.625  

A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 . The amount of  work done in rotating it through 180°  from its equilibrium position will be

(a) 0.1 J

(b) 0.2 J

(c) 0.4 J

(d) 0.8 J