Home
Class 12
PHYSICS
If wavelengths of light in liquid A and ...

If wavelengths of light in liquid A and B are 3500 Å and 7000 Å respectively, then critical angle of liquid A with respect to liquid B is .....

A

`15^@`

B

`30^@`

C

`45^@`

D

`60^@`

Text Solution

Verified by Experts

The correct Answer is:
B, C
Refractive index of A w.r.t. B, `(n_B)/(n_A)=n`
but`1/n=(v_A)/(v_B)=(lambda_Af)/(lambda_Bf)` [`because` f is constant]
`therefore1/n=(lambda_A)/(lambda_B)=(3500)/(7000)`
`1/n=1/2`
sinC=`1/2`
`therefore C=sin^(-1)(1/2)`
`thereforeC=30^@`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)(REFRACTION, MAGNIFICATION, POWER AND COMBINATION OF LENS)|29 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)(REFRACTION AND DISPOSION BY PRISM)|14 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLE CHOICE QUESTIONS (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)(REFRACTION)|32 Videos

  • MOVING CHARGES AND MAGNETISM

    KUMAR PRAKASHAN|Exercise SECTION D (MCQs ASKED IN COMPETITIVE EXAMS)|34 Videos

  • SAMPLE QUESTION PAPER

    KUMAR PRAKASHAN|Exercise PART-B SECTION-C|5 Videos

Similar Questions

Explore conceptually related problems

Frequency and wavelength of light in transparent material are 2xx10^(14) Hz and 5000 Å respectively, then its refractive index is

A uniform solid cylinder of density 0.8g//cm^3 floats in equilibrium in a combination of two non-mixing liquids A and B with its axis vertical. The densities of the liquids A and B are 0.7g//cm^3 and 1.2g//cm^3 , respectively. The height of liquid A is h_A=1.2cm. The length of the part of the cylinder immersed in liquid B is h_B=0.8cm . (a) Find the total force exerted by liquid A on the cylinder. (b) Find h, the length of the part of the cylinder in air.

Two stars emit maximum radiation at wavelength 3600 Å and 4800 Å respectively. The ratio of their temperatures is

Maximum wavelength of radiations from Sun and Moon are 25Å and 0.5xx10^(-6) m respectively ratio of their temperature is . . . .. .

Two liquids A and B are at 30^@C and 20^@C , respectively When they are mixied in equal masses, the temperature of the mixture is found to be 26^@C . The ratio of their specific heat is

If liquids A and B form an ideal solution.

The vapoure pressure of two pure liquids A and B, that from an ideal solution are 100 and 900 torr respectively at temperature T. This liquid solution of A and B is composed of 1 mole of A and 1 mole of B. What will be the pressure, when 1 mole of mixture has been vaporized?