MCQ
Which rays are not the portion of electromagnetic spectrum
- AX-rays
- BMicrowaves
- ✓a-rays
- DRadio waves
✓
Answer
Correct option: C.
a-rays
a-rays
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The refractive indices of violet and red light are $1.54$ and $1.52$ respectively. If the angle of prism is $10^o $, then the angular dispersion is
→The plates of a capacitor are charged to a potential difference of 320 volts and are then connected across a resistor. The potential difference across the capacitor decays exponentially with time. After 1 second the potential difference between the plates of the capacitor is 240 volts, then after 2 and 3 seconds the potential difference between the plates will be
A parallel plate capacitor is charged by connecting it to a battery through a resistor. If $l$ is the current in the circuit, then in the gap between the plates:
→The wavefronts of light coming from a distant source of unknown shape are nearly:
An arbitrary shaped closed coil is made of a wire of length $L$ and a current $I$ ampere is flowing in it. If the plane of the coil is perpendicular to magnetic field $\mathop B\limits^ \to $, the force on the coil is
→In the above figure magnetic field at point $C$ will be
→The mechanical equivalent of heat:
Force of interaction between two co-axial short electric dipoles whose centres are $R$ distance apart varies as
→The energy of a photon of wavelength $\lambda $ is given by
→$A$ cubical block of glass of refractive index $n_1$ is in contact with the surface of water of refractive index $n_2$. A beam of light is incident on vertical face of the block (see figure). After refraction, a total internal reflection at the base and refraction at the opposite vertical face, the ray emerges out at an angle $\theta$ . The value of $\theta$ is given by :
→