Related InterviewSolutions

• A wave of light having frequency `4 xx 10^(14)`Hz. And speed of light `3 xx 10^8` m/s enters glass of R.I. 1.5. Change in wavelength isA. `2.5 xx 10^(-7) m`B. `2.5 xx 10^(-6) m`C. `2.5 xx 10^(-8)m`D. `2.5 xx 10^(-9)m`
• The change in wavelenght of light of frequency `4 xx 10 ^(14)`Hz. When it pass from air to glass, is `( mu_("glass") = 1.5)`A. 2500 ÅB. 3500 ÅC. 3000 ÅD. 2000 Å
• If `._(i)mu_(j)` represents refractive index when a light ray goes from mefium `i` to medium `j`, then the product `._(2)mu_(1)xx._(3)mu_(2)xx._(4)mu_(3)` is equal toA. `._(3)mu_(1)`B. `._(3)mu_(2)`C. `._(4)mu_(1)`D. `._(4)mu_(2)`
• When a man and plane mirror both move towards each other at the rate of 10 m/s. At what rate the image approach the man ?A. 10 m/sB. 20 m/sC. 30 m/sD. 40 m/s
• A plane mirrorr is approaching you at a speed of `10cm//sec`.You can see your image in it. At what speed will your image approach youA. 10 cm/secB. 5 cm/secC. 20 cm/secD. 15 cm/sec
• The wavelength of green light in air and in glass is 5300 Å and 3533 Å. The refractive index of glass isA. 1B. `1.5`C. 2D. `2.4`
• Which of the following is used to eliminate head light glare in automobiles ?A. PolaroidsB. Nicol prismC. Calcite crystalD. Plane mirror
• We can see object due toA. reflection of light from itB. refraction of light through itC. diffractionD. interference of light
• A driver can be see the sunset at an angle ofA. `sin^(-1) (4//3)`B. `sin^(-1) (1//3)`C. `sin^(-1) (1//4)`D. `sin^(-1) (3//4)`
• One cannot cannot see through fog, becauseA. fog absorbs lightB. light is scattered by the droplets in fogC. light suffers total reflection at the droplets in fogD. the refractive index of fog is infinity