SATHEE: wave-optics Question 10

wave-optics Question 10

Question: Q. 1. Consider sunlight incident on a slit of width $10^{4} \AA$ . The image seen through the slit shall

(a) be a fine sharp slit white in colour at the centre.

(b) a bright slit white at the centre diffusing to zero intensities at the edges.

(c) a bright slit white at the centre diffusing to regions of different colours.

(d) only be a diffused slit white in colour.

[NCERT Exemplar]

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Solution:

Ans. Correct option : (a)

Explanation: Given that, width of slit $10^{4} \AA = 10, 000 \AA$ . Wavelength of visible light varies from $4, 000 \AA$ to $8, 000 \AA$ . As the width of slit $10, 000 \AA$ is comparable to that of wavelength of visible light, i.e., 8,000 $\AA$ . Hence the diffraction occurs with maxima at the centre. So at the centre all colours appear, i.e., white colour appears at the centre.

Wave Optics

wave-optics Question 10

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Wave Optics

wave-optics Question 10

Table of Contents

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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