real, inverted and diminished
virtual, inverted and enlarged
real, erect and enlarged
virtual, erect and enlarged
Correct answer is D
No explanation has been provided for this answer.
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.
5.3cm
3.2cm
2.7cm
1.6cm
Correct answer is B
v = 4u, if u = 2cm, v = 8cm
F = \(\frac{uv}{u + v}\)
= \(\frac{2 \times 8}{2 + 8}\)
= 1.6cm
r = 2F
= 2 x 1.6
= 3.2cm
If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?
sin-1\(\frac{1}{2}\)
sin-1\(\frac{2}{3}\)
sin-1\(\frac{3}{4}\)
sin-1\(\frac{8}{9}\)
Correct answer is B
sin ic \(\frac{1}{n}\) = \(\frac{1}{1 - 5}\)
i = sin-1\(\frac{1}{1 - 5}\)
= sin-1\(\frac{10}{15}\)
= sin-1\(\frac{2}{3}\)
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.