Pick out the longest wavelength from the following types of radiations.
Blue light
Gamma rays
X-rays
Red light
The splitting of white light into its constituent colours is called
refraction
dispersion
deviation
diffraction
When a mirror is rotated by an angle θ,the reflected ray will rotate by :
0°
θ/2
θ
2θ
Total internal reflection can take place when light travels from:
diamond to glass
water to glass
air to water
air to glass
The three primary or basic colours are
red, blue, yellow
yellow, green, orange
red, green, yellow
red, green, blue
The complementary colour of green is
magenta
purple
cyan
red
Which colour is used in signal lamps?
blue
orange
yellow
When a CD (compact disc used in audio and video systems) is seen in sunlight,rainbow like colours are seen.This can be explained on the basis of the phenomenon of :
reflection and diffraction
reflection and transmission
diffraction and transmission
refraction,diffraction and transmission
Rainbows are formed by
refraction and scattering
dispersion and total internal reflection
interference only
Suppose a rocketship is receding from the earth at a speed of 2/10 th the velocity of light.A light in the rocketship appears blue to the passengers on the ship.What colour would it appear to an observer on the earth?
yellow - orange
