Wave Optics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 13 - 16 of 92
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Question 13
Question MCQ▾
When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarized. Determine refractive index of given material –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | 2 | |
c. | ||
d. |
Question 14
Question MCQ▾
A light has amplitude A and angle between analyser and polariser is 60°. Light transmitted by analyser has amplitude
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 15
Question MCQ▾
The width of one of the two slits in a Young՚s double slit experiment is double of the other slit. Assuming that the amplitude of the light is coming from a slit is proportional to slit-width. Find the ratio of the maximum to the minimum intensity in the interference pattern.
Choices
Choice (4) | Response | |
---|---|---|
a. | 34: 1 | |
b. | 9: 1 | |
c. | 16: 1 | |
d. | 4: 1 |
Question 16
Question MCQ▾
Interference fringes were produced in Young՚s double slit experiment using light of wave length 5000 Å. When a film of material 2.5 × 10-3 cm thick was placed over one of die slits, the fringe pattern shifted by a distance equal to 20 fringe width. The refractive index of the material of die film cannot be
(1) 1.25 (2) 1.33
(3) 1.5 (4) 1.4
Select the correct answers and mark it according to the following codes:
Codes:
Choices
Choice (4) | Response | |
---|---|---|
a. | 1 and 2 are correct | |
b. | 1 and 3 are correct | |
c. | 1,2 and 3 are correct | |
d. | 2 and 4 are correct |