What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it
gives a blurred image
corrects for chromatic aberration
magnifies the image
brings the image into a sharper focus
Correct answer is A
No explanation has been provided for this answer.
If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?
sin-112
sin-123
sin-134
sin-189
Correct answer is B
sin ic 1n = 11−5
i = sin-111−5
= sin-11015
= sin-123
In which of the following arrangements is the wavelength in an increasing order?
Gamma rays, infra-red rays, x-rays, radiowaves
Gamma rays, x-rays, infra-red ray, radiowaves
Radiowaves, x-rays, gamma ray, infra-red rays
Infra-red rays, radiowaves, x-rays, gamma rays
Correct answer is B
No explanation has been provided for this answer.